How much is a Russian 19 set worth unmolested and with the VHF section ?barn find ......photos tomorrow......
....
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 .....
How much is a Russian 19 set worth unmolested and with the VHF sectionbarn find ......photos tomorrow......
? ....
On 22/03/2022 20:29, Jim Stewart ... wrote:
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 .....
How much is a Russian 19 set worth unmolested and with the VHF sectionbarn find ......photos tomorrow......
? ....
On Tue, 22 Mar 2022 20:46:51 +0000, "Jim Stewart ..." <kinvig.netta@ntlworld.com> wrote:big wooden one with the turret tuner ? ...
On 22/03/2022 20:29, Jim Stewart ... wrote:
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 .....
How much is a Russian 19 set worth unmolested and with the VHF section >>>> ? ....barn find ......photos tomorrow......
I've a selena vega in bits on the bench....changed a lot of
capacitors..but might sling it now !
On 22/03/2022 20:46, Jim Stewart ... wrote:
On 22/03/2022 20:29, Jim Stewart ... wrote:
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 .....
How much is a Russian 19 set worth unmolested and with the VHFbarn find ......photos tomorrow......
section ? ....
Oh look it's a 19 set MK2 ...I had a Mk3 ...RCA manufacturing Co inc USA 1942...with 235 Mc/c...has Russian markings though...looks mint...must
be worth a bob or two ? ....
On 22/03/2022 20:29, Jim Stewart ... wrote:
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 .....
How much is a Russian 19 set worth unmolested and with the VHFbarn find ......photos tomorrow......
section ? ....
How much is a Russian 19 set worth unmolested and with the VHF section ?coming soon another 19 set with dynomotors etc and an 1155 both in
....
How much is a Russian 19 set worth unmolested and with the VHF section ?
....
On 22/03/2022 20:16, Jim Stewart ... wrote:
How much is a Russian 19 set worth unmolested and with the VHF section
? ....
https://ibb.co/YbX0Gmw
https://ibb.co/ThTsTwY
https://ibb.co/wCXJZ9B
https://ibb.co/yhgd2nv
https://ibb.co/7KZTQ67
https://ibb.co/FhyfNL4
https://ibb.co/P57CRcL
https://ibb.co/WgLFjX7
https://ibb.co/9gxfCGM
https://ibb.co/ZSMDSP6
https://ibb.co/5Fg61Rx
https://ibb.co/v1v5HfV
https://ibb.co/yS9Qpfg
https://ibb.co/YbG3KTj
https://ibb.co/mBvPG6f
On 23/03/2022 11:57, Jim Stewart ... wrote:nice 807
On 22/03/2022 20:16, Jim Stewart ... wrote:
How much is a Russian 19 set worth unmolested and with the VHF
section ? ....
https://ibb.co/YbX0Gmw
https://ibb.co/ThTsTwY
https://ibb.co/wCXJZ9B
https://ibb.co/yhgd2nv
https://ibb.co/7KZTQ67
https://ibb.co/FhyfNL4
https://ibb.co/P57CRcL
https://ibb.co/WgLFjX7
https://ibb.co/9gxfCGM
https://ibb.co/ZSMDSP6
https://ibb.co/5Fg61Rx
https://ibb.co/v1v5HfV
https://ibb.co/yS9Qpfg
https://ibb.co/YbG3KTj
https://ibb.co/mBvPG6f
and....unmolested innards
https://ibb.co/Qbz1Nbm
https://ibb.co/8KgLGWw
https://ibb.co/rfbxSG7
https://ibb.co/s226gVX
https://ibb.co/qrfMfPS
https://ibb.co/hH9L04V
https://ibb.co/wy7N8gZ
https://ibb.co/Fbv9CGw
https://ibb.co/jgTjz41
https://ibb.co/pf6r8Pv
https://ibb.co/k6wkrLX
https://ibb.co/D76j1bz
https://ibb.co/W0LK55N
On 23/03/2022 07:23, Jim Stewart ... wrote:
On 22/03/2022 20:46, Jim Stewart ... wrote:[...]
On 22/03/2022 20:29, Jim Stewart ... wrote:
[...]
[...]
...looks way better than the 35/- G W Smith one I had in 1968 .....
Oh look it's a 19 set MK2 ...I had a Mk3 ...RCA manufacturing Co inc USA 1942...with 235 Mc/c...has Russian markings though...looks mint...must
be worth a bob or two ? ....
what does quench mean ?
On 22/03/2022 23:50, Rambo wrote:Thats the one
On Tue, 22 Mar 2022 20:46:51 +0000, "Jim Stewart ..."big wooden one with the turret tuner ? ...
<kinvig.netta@ntlworld.com> wrote:
On 22/03/2022 20:29, Jim Stewart ... wrote:
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 .....
How much is a Russian 19 set worth unmolested and with the VHF section >>>>> ? ....barn find ......photos tomorrow......
I've a selena vega in bits on the bench....changed a lot of
capacitors..but might sling it now !
On Wed, 23 Mar 2022 07:25:35 +0000
"Jim Stewart ..." <kinvig.netta@ntlworld.com> wrote:
On 23/03/2022 07:23, Jim Stewart ... wrote:
On 22/03/2022 20:46, Jim Stewart ... wrote:[...]
On 22/03/2022 20:29, Jim Stewart ... wrote:
[...]
[...]
...looks way better than the 35/- G W Smith one I had in 1968 .....
Oh look it's a 19 set MK2 ...I had a Mk3 ...RCA manufacturing Co inc USA >> > 1942...with 235 Mc/c...has Russian markings though...looks mint...must
be worth a bob or two ? ....
what does quench mean ?
Basically kills self-oscillation in regen and super-regen receivers.
In message <20220323132210.347480fc@deangelis.fenrir.org.uk>, Brianwoo hoo
Morrison <news@fenrir.org.uk> writes
On Wed, 23 Mar 2022 07:25:35 +0000Presumably used by the 235Mc part.
"Jim Stewart ..." <kinvig.netta@ntlworld.com> wrote:
On 23/03/2022 07:23, Jim Stewart ... wrote:
On 22/03/2022 20:46, Jim Stewart ... wrote:[...]
On 22/03/2022 20:29, Jim Stewart ... wrote:
[...]
[...]
inc USA...looks way better than the 35/- G W Smith one I had in 1968 .....
Oh look it's a 19 set MK2 ...I had a Mk3 ...RCA manufacturing Co
1942...with 235 Mc/c...has Russian markings though...looks mint...must >>> > be worth a bob or two ? ....
what does quench mean ?
Basically kills self-oscillation in regen and super-regen receivers.
For it's age, it really does look like it's in excellent condition.
There can't be many around like that. I reckon Jim's a rich man!
On 23/03/2022 07:23, Jim Stewart ... wrote:
On 22/03/2022 20:46, Jim Stewart ... wrote:
On 22/03/2022 20:29, Jim Stewart ... wrote:
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 .....
How much is a Russian 19 set worth unmolested and with the VHFbarn find ......photos tomorrow......
section ? ....
Oh look it's a 19 set MK2 ...I had a Mk3 ...RCA manufacturing Co inc USA
1942...with 235 Mc/c...has Russian markings though...looks mint...must
be worth a bob or two ? ....
what does quench mean ?
Jim Stewart ... <kinvig.netta@ntlworld.com> wrote:
On 23/03/2022 07:23, Jim Stewart ... wrote:
On 22/03/2022 20:46, Jim Stewart ... wrote:
On 22/03/2022 20:29, Jim Stewart ... wrote:
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 .....
How much is a Russian 19 set worth unmolested and with the VHFbarn find ......photos tomorrow......
section ? ....
Oh look it's a 19 set MK2 ...I had a Mk3 ...RCA manufacturing Co inc USA >>> 1942...with 235 Mc/c...has Russian markings though...looks mint...must
be worth a bob or two ? ....
what does quench mean ?
I thought you passed the RAE.
On Wed, 23 Mar 2022 07:25:35 +0000
"Jim Stewart ..." <kinvig.netta@ntlworld.com> wrote:
On 23/03/2022 07:23, Jim Stewart ... wrote:
On 22/03/2022 20:46, Jim Stewart ... wrote:[...]
On 22/03/2022 20:29, Jim Stewart ... wrote:
[...]
[...]
...looks way better than the 35/- G W Smith one I had in 1968 .....
Oh look it's a 19 set MK2 ...I had a Mk3 ...RCA manufacturing Co inc USA >>> 1942...with 235 Mc/c...has Russian markings though...looks mint...must
be worth a bob or two ? ....
what does quench mean ?
Basically kills self-oscillation in regen and super-regen receivers.
On 23/03/2022 16:26, Brian wrote:
Jim Stewart ... <kinvig.netta@ntlworld.com> wrote:havn't heard that term for over 50 years ....vaguely remember hearing
On 23/03/2022 07:23, Jim Stewart ... wrote:I thought you passed the RAE.
On 22/03/2022 20:46, Jim Stewart ... wrote:
On 22/03/2022 20:29, Jim Stewart ... wrote:
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 .....
How much is a Russian 19 set worth unmolested and with the VHFbarn find ......photos tomorrow......
section ? ....
Oh look it's a 19 set MK2 ...I had a Mk3 ...RCA manufacturing Co inc USA >>>> 1942...with 235 Mc/c...has Russian markings though...looks mint...must >>>> be worth a bob or two ? ....
what does quench mean ?
it now .... never had a regen rx...can you ever forgive me brian....
brian <nospam@b-howie.co.uk> wrote:
In message <t1fi5h$aii$1@dont-email.me>, Jim Stewart ...
<kinvig.netta@ntlworld.com> writes
On 23/03/2022 16:26, Brian wrote:
Jim Stewart ... <kinvig.netta@ntlworld.com> wrote:havn't heard that term for over 50 years ....vaguely remember hearing
On 23/03/2022 07:23, Jim Stewart ... wrote:I thought you passed the RAE.
On 22/03/2022 20:46, Jim Stewart ... wrote:
On 22/03/2022 20:29, Jim Stewart ... wrote:Oh look it's a 19 set MK2 ...I had a Mk3 ...RCA manufacturing Co inc USA >>>>>> 1942...with 235 Mc/c...has Russian markings though...looks mint...must >>>>>> be worth a bob or two ? ....
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 ..... >>>>>>
How much is a Russian 19 set worth unmolested and with the VHF >>>>>>>>> section ? ....barn find ......photos tomorrow......
what does quench mean ?
it now .... never had a regen rx...can you ever forgive me brian....
It dates back to spark transmission .
Brian
No.
Hertz’s first experiments were using spark gaps, in the 1880s
Marconi used a spark transmitter for his first trans Atlantic transmission
in 1901.
Regenerative receivers were invented a decade later by Armstrong.
Prior to that, coherers, Marconi’s magnetic detectors, crystals, leaky grid valve based detectors, were still used.
Didn’t you ever read about the history of radio?
In message <t1fi5h$aii$1@dont-email.me>, Jim Stewart ... <kinvig.netta@ntlworld.com> writes
On 23/03/2022 16:26, Brian wrote:
Jim Stewart ... <kinvig.netta@ntlworld.com> wrote:havn't heard that term for over 50 years ....vaguely remember hearing
On 23/03/2022 07:23, Jim Stewart ... wrote:I thought you passed the RAE.
On 22/03/2022 20:46, Jim Stewart ... wrote:
On 22/03/2022 20:29, Jim Stewart ... wrote:Oh look it's a 19 set MK2 ...I had a Mk3 ...RCA manufacturing Co inc USA >>>>> 1942...with 235 Mc/c...has Russian markings though...looks mint...must >>>>> be worth a bob or two ? ....
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 ..... >>>>>
How much is a Russian 19 set worth unmolested and with the VHF >>>>>>>> section ? ....barn find ......photos tomorrow......
what does quench mean ?
it now .... never had a regen rx...can you ever forgive me brian....
It dates back to spark transmission .
Brian
On 23/03/2022 18:32, Brian wrote:getting my brians mixed up there
brian <nospam@b-howie.co.uk> wrote:titter titter
In message <t1fi5h$aii$1@dont-email.me>, Jim Stewart ...
<kinvig.netta@ntlworld.com> writes
On 23/03/2022 16:26, Brian wrote:
Jim Stewart ... <kinvig.netta@ntlworld.com> wrote:havn't heard that term for over 50 years ....vaguely remember hearing
On 23/03/2022 07:23, Jim Stewart ... wrote:I thought you passed the RAE.
On 22/03/2022 20:46, Jim Stewart ... wrote:
On 22/03/2022 20:29, Jim Stewart ... wrote:Oh look it's a 19 set MK2 ...I had a Mk3 ...RCA manufacturing Co >>>>>>> inc USA
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 ..... >>>>>>>
How much is a Russian 19 set worth unmolested and with the VHF >>>>>>>>>> section ? ....barn find ......photos tomorrow......
1942...with 235 Mc/c...has Russian markings though...looks
mint...must
be worth a bob or two ? ....
what does quench mean ?
it now .... never had a regen rx...can you ever forgive me brian....
It dates back to spark transmission .
Brian
No.
Hertz’s first experiments were using spark gaps, in the 1880s
Marconi used a spark transmitter for his first trans Atlantic
transmission
in 1901.
Regenerative receivers were invented a decade later by Armstrong.
Prior to that, coherers, Marconi’s magnetic detectors, crystals, leaky
grid
valve based detectors, were still used.
Didn’t you ever read about the history of radio?
On 23/03/2022 18:34, Jim Stewart ... wrote:
On 23/03/2022 18:32, Brian wrote:getting my brians mixed up there
brian <nospam@b-howie.co.uk> wrote:titter titter
In message <t1fi5h$aii$1@dont-email.me>, Jim Stewart ...
<kinvig.netta@ntlworld.com> writes
On 23/03/2022 16:26, Brian wrote:
Jim Stewart ... <kinvig.netta@ntlworld.com> wrote:havn't heard that term for over 50 years ....vaguely remember hearing >>>>> it now .... never had a regen rx...can you ever forgive me brian....
On 23/03/2022 07:23, Jim Stewart ... wrote:I thought you passed the RAE.
On 22/03/2022 20:46, Jim Stewart ... wrote:
On 22/03/2022 20:29, Jim Stewart ... wrote:Oh look it's a 19 set MK2 ...I had a Mk3 ...RCA manufacturing Co >>>>>>>> inc USA
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 ..... >>>>>>>>
How much is a Russian 19 set worth unmolested and with the VHF >>>>>>>>>>> section ? ....barn find ......photos tomorrow......
1942...with 235 Mc/c...has Russian markings though...looks
mint...must
be worth a bob or two ? ....
what does quench mean ?
It dates back to spark transmission .
Brian
No.
Hertz’s first experiments were using spark gaps, in the 1880s
Marconi used a spark transmitter for his first trans Atlantic
transmission
in 1901.
Regenerative receivers were invented a decade later by Armstrong.
Prior to that, coherers, Marconi’s magnetic detectors, crystals, leaky >>> grid
valve based detectors, were still used.
Didn’t you ever read about the history of radio?
Jim Stewart ... <kinvig.netta@ntlworld.com> wrote:
On 23/03/2022 18:34, Jim Stewart ... wrote:
On 23/03/2022 18:32, Brian wrote:getting my brians mixed up there
brian <nospam@b-howie.co.uk> wrote:titter titter
In message <t1fi5h$aii$1@dont-email.me>, Jim Stewart ...
<kinvig.netta@ntlworld.com> writes
On 23/03/2022 16:26, Brian wrote:It dates back to spark transmission .
Jim Stewart ... <kinvig.netta@ntlworld.com> wrote:havn't heard that term for over 50 years ....vaguely remember hearing >>>>>> it now .... never had a regen rx...can you ever forgive me brian.... >>>>>
On 23/03/2022 07:23, Jim Stewart ... wrote:I thought you passed the RAE.
On 22/03/2022 20:46, Jim Stewart ... wrote:
On 22/03/2022 20:29, Jim Stewart ... wrote:Oh look it's a 19 set MK2 ...I had a Mk3 ...RCA manufacturing Co >>>>>>>>> inc USA
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 ..... >>>>>>>>>
How much is a Russian 19 set worth unmolested and with the VHF >>>>>>>>>>>> section ? ....barn find ......photos tomorrow......
1942...with 235 Mc/c...has Russian markings though...looks
mint...must
be worth a bob or two ? ....
what does quench mean ?
Brian
No.
Hertz’s first experiments were using spark gaps, in the 1880s
Marconi used a spark transmitter for his first trans Atlantic
transmission
in 1901.
Regenerative receivers were invented a decade later by Armstrong.
Prior to that, coherers, Marconi’s magnetic detectors, crystals, leaky >>>> grid
valve based detectors, were still used.
Didn’t you ever read about the history of radio?
Yes.
Two of you looking silly.
On 23 Mar 2022 at 18:32:25 GMT, "Brian" <noinv@lid.org> wrote:
brian <nospam@b-howie.co.uk> wrote:
In message <t1fi5h$aii$1@dont-email.me>, Jim Stewart ...
<kinvig.netta@ntlworld.com> writes
On 23/03/2022 16:26, Brian wrote:
Jim Stewart ... <kinvig.netta@ntlworld.com> wrote:havn't heard that term for over 50 years ....vaguely remember hearing
On 23/03/2022 07:23, Jim Stewart ... wrote:I thought you passed the RAE.
On 22/03/2022 20:46, Jim Stewart ... wrote:
On 22/03/2022 20:29, Jim Stewart ... wrote:Oh look it's a 19 set MK2 ...I had a Mk3 ...RCA manufacturing Co inc USA
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 ..... >>>>>>>
How much is a Russian 19 set worth unmolested and with the VHF >>>>>>>>>> section ? ....barn find ......photos tomorrow......
1942...with 235 Mc/c...has Russian markings though...looks mint...must >>>>>>> be worth a bob or two ? ....
what does quench mean ?
it now .... never had a regen rx...can you ever forgive me brian....
It dates back to spark transmission .
Brian
No.
Hertz’s first experiments were using spark gaps, in the 1880s
Marconi used a spark transmitter for his first trans Atlantic transmission >> in 1901.
Regenerative receivers were invented a decade later by Armstrong.
Prior to that, coherers, Marconi’s magnetic detectors, crystals, leaky grid
valve based detectors, were still used.
Didn’t you ever read about the history of radio?
Quenching applied to spark gaps before it applied to valve oscillating circuits. I had vaguely though it was to do with switching the transmission on
an off, but a brief google suggests it was more to do with increased efficiency of transfer of power to a tuned circuit. Which makes me wonder if quenching of regenerative receivers is more to do with sensitivity than stopping them oscillating. I freely admit to general ignorance on the topic, but I did know that quenched sparks were a thing!
brian <nospam@b-howie.co.uk> wrote:
In message <t1fi5h$aii$1@dont-email.me>, Jim Stewart ...
<kinvig.netta@ntlworld.com> writes
On 23/03/2022 16:26, Brian wrote:
Jim Stewart ... <kinvig.netta@ntlworld.com> wrote:havn't heard that term for over 50 years ....vaguely remember hearing
On 23/03/2022 07:23, Jim Stewart ... wrote:I thought you passed the RAE.
On 22/03/2022 20:46, Jim Stewart ... wrote:
On 22/03/2022 20:29, Jim Stewart ... wrote:Oh look it's a 19 set MK2 ...I had a Mk3 ...RCA manufacturing Co inc USA >>>>>> 1942...with 235 Mc/c...has Russian markings though...looks mint...must >>>>>> be worth a bob or two ? ....
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 ..... >>>>>>
How much is a Russian 19 set worth unmolested and with the VHF >>>>>>>>> section ? ....barn find ......photos tomorrow......
what does quench mean ?
it now .... never had a regen rx...can you ever forgive me brian....
It dates back to spark transmission .
Brian
No.
Hertz’s first experiments were using spark gaps, in the 1880s
Marconi used a spark transmitter for his first trans Atlantic transmission
in 1901.
Regenerative receivers were invented a decade later by Armstrong.
Prior to that, coherers, Marconi’s magnetic detectors, crystals, leaky grid valve based detectors, were still used.
Didn’t you ever read about the history of radio?
On Wed, 23 Mar 2022 07:05:27 +0000, "Jim Stewart ..." <kinvig.netta@ntlworld.com> wrote:very nice... were cheap in the 70's
On 22/03/2022 23:50, Rambo wrote:Thats the one
On Tue, 22 Mar 2022 20:46:51 +0000, "Jim Stewart ..."big wooden one with the turret tuner ? ...
<kinvig.netta@ntlworld.com> wrote:
On 22/03/2022 20:29, Jim Stewart ... wrote:
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 .....
How much is a Russian 19 set worth unmolested and with the VHF section >>>>>> ? ....barn find ......photos tomorrow......
I've a selena vega in bits on the bench....changed a lot of
capacitors..but might sling it now !
Roger Hayter <roger@hayter.org> wrote:
On 23 Mar 2022 at 18:32:25 GMT, "Brian" <noinv@lid.org> wrote:
brian <nospam@b-howie.co.uk> wrote:
In message <t1fi5h$aii$1@dont-email.me>, Jim Stewart ...
<kinvig.netta@ntlworld.com> writes
On 23/03/2022 16:26, Brian wrote:
Jim Stewart ... <kinvig.netta@ntlworld.com> wrote:havn't heard that term for over 50 years ....vaguely remember hearing >>>>> it now .... never had a regen rx...can you ever forgive me brian....
On 23/03/2022 07:23, Jim Stewart ... wrote:I thought you passed the RAE.
On 22/03/2022 20:46, Jim Stewart ... wrote:
On 22/03/2022 20:29, Jim Stewart ... wrote:Oh look it's a 19 set MK2 ...I had a Mk3 ...RCA manufacturing Co inc USA
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 ..... >>>>>>>>
How much is a Russian 19 set worth unmolested and with the VHF >>>>>>>>>>> section ? ....barn find ......photos tomorrow......
1942...with 235 Mc/c...has Russian markings though...looks mint...must >>>>>>>> be worth a bob or two ? ....
what does quench mean ?
It dates back to spark transmission .
Brian
No.
Hertz’s first experiments were using spark gaps, in the 1880s
Marconi used a spark transmitter for his first trans Atlantic transmission >>> in 1901.
Regenerative receivers were invented a decade later by Armstrong.
Prior to that, coherers, Marconi’s magnetic detectors, crystals, leaky grid
valve based detectors, were still used.
Didn’t you ever read about the history of radio?
Quenching applied to spark gaps before it applied to valve oscillating
circuits. I had vaguely though it was to do with switching the transmission on
an off, but a brief google suggests it was more to do with increased
efficiency of transfer of power to a tuned circuit. Which makes me wonder if >> quenching of regenerative receivers is more to do with sensitivity than
stopping them oscillating. I freely admit to general ignorance on the topic, >> but I did know that quenched sparks were a thing!
The ‘best’ (in simple terms) way to operate a regen is to keep it on the edge of oscillation.
The quench control is a way of helping maintain this state.
I’ve seen the term used in relation to coherers. As I recall, to automatically trigger the circuit which reset the coherer but I confess I’m not sure. However, 19 sets had a regen Rx for VHF (200 or so MHz I think) used for short range use.
On 23/03/2022 20:09, Brian wrote:
Roger Hayter <roger@hayter.org> wrote:yes and mine is still fitted....quality
On 23 Mar 2022 at 18:32:25 GMT, "Brian" <noinv@lid.org> wrote:
brian <nospam@b-howie.co.uk> wrote:
In message <t1fi5h$aii$1@dont-email.me>, Jim Stewart ...
<kinvig.netta@ntlworld.com> writes
On 23/03/2022 16:26, Brian wrote:It dates back to spark transmission .
Jim Stewart ... <kinvig.netta@ntlworld.com> wrote:havn't heard that term for over 50 years ....vaguely remember hearing >>>>>> it now .... never had a regen rx...can you ever forgive me brian.... >>>>>
On 23/03/2022 07:23, Jim Stewart ... wrote:I thought you passed the RAE.
On 22/03/2022 20:46, Jim Stewart ... wrote:
On 22/03/2022 20:29, Jim Stewart ... wrote:Oh look it's a 19 set MK2 ...I had a Mk3 ...RCA manufacturing Co inc USA
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 ..... >>>>>>>>>
How much is a Russian 19 set worth unmolested and with the VHF >>>>>>>>>>>> section ? ....barn find ......photos tomorrow......
1942...with 235 Mc/c...has Russian markings though...looks mint...must
be worth a bob or two ? ....
what does quench mean ?
Brian
No.
Hertz’s first experiments were using spark gaps, in the 1880s
Marconi used a spark transmitter for his first trans Atlantic transmission >>>> in 1901.
Regenerative receivers were invented a decade later by Armstrong.
Prior to that, coherers, Marconi’s magnetic detectors, crystals, leaky grid
valve based detectors, were still used.
Didn’t you ever read about the history of radio?
Quenching applied to spark gaps before it applied to valve oscillating
circuits. I had vaguely though it was to do with switching the transmission on
an off, but a brief google suggests it was more to do with increased
efficiency of transfer of power to a tuned circuit. Which makes me wonder if
quenching of regenerative receivers is more to do with sensitivity than
stopping them oscillating. I freely admit to general ignorance on the topic,
but I did know that quenched sparks were a thing!
The ‘best’ (in simple terms) way to operate a regen is to keep it on the >> edge of oscillation.
The quench control is a way of helping maintain this state.
I’ve seen the term used in relation to coherers. As I recall, to
automatically trigger the circuit which reset the coherer but I confess I’m
not sure. However, 19 sets had a regen Rx for VHF (200 or so MHz I think) >> used for short range use.
brian <nospam@b-howie.co.uk> wrote:
In message <t1fi5h$aii$1@dont-email.me>, Jim Stewart ...
<kinvig.netta@ntlworld.com> writes
On 23/03/2022 16:26, Brian wrote:
Jim Stewart ... <kinvig.netta@ntlworld.com> wrote:havn't heard that term for over 50 years ....vaguely remember hearing
On 23/03/2022 07:23, Jim Stewart ... wrote:I thought you passed the RAE.
On 22/03/2022 20:46, Jim Stewart ... wrote:
On 22/03/2022 20:29, Jim Stewart ... wrote:Oh look it's a 19 set MK2 ...I had a Mk3 ...RCA manufacturing Co inc USA >>>>>> 1942...with 235 Mc/c...has Russian markings though...looks mint...must >>>>>> be worth a bob or two ? ....
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 ..... >>>>>>
How much is a Russian 19 set worth unmolested and with the VHF >>>>>>>>> section ? ....barn find ......photos tomorrow......
what does quench mean ?
it now .... never had a regen rx...can you ever forgive me brian....
It dates back to spark transmission .
Brian
No.
Hertz’s first experiments were using spark gaps, in the 1880s
Marconi used a spark transmitter for his first trans Atlantic transmission
in 1901.
Regenerative receivers were invented a decade later by Armstrong.
Prior to that, coherers, Marconi’s magnetic detectors, crystals, leaky grid >valve based detectors, were still used.
Didn’t you ever read about the history of radio?
Jim Stewart ... <kinvig.netta@ntlworld.com> wrote:
On 23/03/2022 20:09, Brian wrote:
Roger Hayter <roger@hayter.org> wrote:yes and mine is still fitted....quality
On 23 Mar 2022 at 18:32:25 GMT, "Brian" <noinv@lid.org> wrote:
brian <nospam@b-howie.co.uk> wrote:
In message <t1fi5h$aii$1@dont-email.me>, Jim Stewart ...
<kinvig.netta@ntlworld.com> writes
On 23/03/2022 16:26, Brian wrote:It dates back to spark transmission .
Jim Stewart ... <kinvig.netta@ntlworld.com> wrote:havn't heard that term for over 50 years ....vaguely remember hearing >>>>>>> it now .... never had a regen rx...can you ever forgive me brian.... >>>>>>
On 23/03/2022 07:23, Jim Stewart ... wrote:I thought you passed the RAE.
On 22/03/2022 20:46, Jim Stewart ... wrote:
On 22/03/2022 20:29, Jim Stewart ... wrote:Oh look it's a 19 set MK2 ...I had a Mk3 ...RCA manufacturing Co inc USA
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 ..... >>>>>>>>>>
How much is a Russian 19 set worth unmolested and with the VHF >>>>>>>>>>>>> section ? ....barn find ......photos tomorrow......
1942...with 235 Mc/c...has Russian markings though...looks mint...must
be worth a bob or two ? ....
what does quench mean ?
Brian
No.
Hertz’s first experiments were using spark gaps, in the 1880s
Marconi used a spark transmitter for his first trans Atlantic transmission
in 1901.
Regenerative receivers were invented a decade later by Armstrong.
Prior to that, coherers, Marconi’s magnetic detectors, crystals, leaky grid
valve based detectors, were still used.
Didn’t you ever read about the history of radio?
Quenching applied to spark gaps before it applied to valve oscillating >>>> circuits. I had vaguely though it was to do with switching the transmission on
an off, but a brief google suggests it was more to do with increased
efficiency of transfer of power to a tuned circuit. Which makes me wonder if
quenching of regenerative receivers is more to do with sensitivity than >>>> stopping them oscillating. I freely admit to general ignorance on the topic,
but I did know that quenched sparks were a thing!
The ‘best’ (in simple terms) way to operate a regen is to keep it on the
edge of oscillation.
The quench control is a way of helping maintain this state.
I’ve seen the term used in relation to coherers. As I recall, to
automatically trigger the circuit which reset the coherer but I confess I’m
not sure. However, 19 sets had a regen Rx for VHF (200 or so MHz I think) >>> used for short range use.
The really rare ones are those made for Italy- I assume post war or late in WW2.
In message <t1fp3o$6il$1@dont-email.me>, Brian <noinv@lid.org> writes
brian <nospam@b-howie.co.uk> wrote:
In message <t1fi5h$aii$1@dont-email.me>, Jim Stewart ...
<kinvig.netta@ntlworld.com> writes
On 23/03/2022 16:26, Brian wrote:
Jim Stewart ... <kinvig.netta@ntlworld.com> wrote:havn't heard that term for over 50 years ....vaguely remember hearing
On 23/03/2022 07:23, Jim Stewart ... wrote:I thought you passed the RAE.
On 22/03/2022 20:46, Jim Stewart ... wrote:
On 22/03/2022 20:29, Jim Stewart ... wrote:Oh look it's a 19 set MK2 ...I had a Mk3 ...RCA manufacturing Co >>>>>>> inc USA
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 ..... >>>>>>>
How much is a Russian 19 set worth unmolested and with the VHF >>>>>>>>>> section ? ....barn find ......photos tomorrow......
1942...with 235 Mc/c...has Russian markings though...looks
mint...must
be worth a bob or two ? ....
what does quench mean ?
it now .... never had a regen rx...can you ever forgive me brian....
It dates back to spark transmission .
Brian
No.
Hertz’s first experiments were using spark gaps, in the 1880s
Marconi used a spark transmitter for his first trans Atlantic
transmission
in 1901.
Regenerative receivers were invented a decade later by Armstrong.
Prior to that, coherers, Marconi’s magnetic detectors, crystals, leaky
grid
valve based detectors, were still used.
Didn’t you ever read about the history of radio?
Quenching was used in spark transmitters to extinguish the spark, eitherdidn't know that
by blowing air or increasing the gap. It allowed a higher transmission
rate.
Brian
Quenching was used in spark transmitters to extinguish the spark, either
by blowing air or increasing the gap. It allowed a higher transmission
rate.
On 23/03/2022 13:53, Rambo wrote:very engineered too... but soviet capacitors are total crap.
On Wed, 23 Mar 2022 07:05:27 +0000, "Jim Stewart ..."very nice... were cheap in the 70's
<kinvig.netta@ntlworld.com> wrote:
On 22/03/2022 23:50, Rambo wrote:Thats the one
On Tue, 22 Mar 2022 20:46:51 +0000, "Jim Stewart ..."big wooden one with the turret tuner ? ...
<kinvig.netta@ntlworld.com> wrote:
On 22/03/2022 20:29, Jim Stewart ... wrote:
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 .....
How much is a Russian 19 set worth unmolested and with the VHF section >>>>>>> ? ....barn find ......photos tomorrow......
I've a selena vega in bits on the bench....changed a lot of
capacitors..but might sling it now !
On Wed, 23 Mar 2022 23:33:04 +0000
brian <nospam@b-howie.co.uk> wrote:
Quenching was used in spark transmitters to extinguish the spark, either
by blowing air or increasing the gap. It allowed a higher transmission
rate.
c.f. air-blast circuit-breakers, used in HV work where any arc formed on opening the contacts is disrupted to dissipate it before anything is
damaged.
Brian Morrison <news@fenrir.org.uk> wrote:or used in relay sets to avoid contact damage when switching other
On Wed, 23 Mar 2022 23:33:04 +0000
brian <nospam@b-howie.co.uk> wrote:
Quenching was used in spark transmitters to extinguish the spark, either >>> by blowing air or increasing the gap. It allowed a higher transmission
rate.
c.f. air-blast circuit-breakers, used in HV work where any arc formed on
opening the contacts is disrupted to dissipate it before anything is
damaged.
I recall one of my Uni lecturers giving a demo of one.
Like spark transmitters, not found in 19 Sets ;-)
On Wed, 23 Mar 2022 21:52:53 +0000, "Jim Stewart ..." <kinvig.netta@ntlworld.com> wrote:was that the one where in the lavish adverts it went on about the 10.7
On 23/03/2022 13:53, Rambo wrote:very engineered too... but soviet capacitors are total crap.
On Wed, 23 Mar 2022 07:05:27 +0000, "Jim Stewart ..."very nice... were cheap in the 70's
<kinvig.netta@ntlworld.com> wrote:
On 22/03/2022 23:50, Rambo wrote:Thats the one
On Tue, 22 Mar 2022 20:46:51 +0000, "Jim Stewart ..."big wooden one with the turret tuner ? ...
<kinvig.netta@ntlworld.com> wrote:
On 22/03/2022 20:29, Jim Stewart ... wrote:I've a selena vega in bits on the bench....changed a lot of
On 22/03/2022 20:16, Jim Stewart ... wrote:...looks way better than the 35/- G W Smith one I had in 1968 ..... >>>>>
How much is a Russian 19 set worth unmolested and with the VHF section >>>>>>>> ? ....barn find ......photos tomorrow......
capacitors..but might sling it now !
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