• Re: Proton Magnetometer

    From Jeff Layman@21:1/5 to pinnerite on Thu Dec 26 22:56:16 2024
    On 26/12/2024 21:56, pinnerite wrote:
    Many Years ago Practical Mechanics ran an article describing the
    construction of a proton magnetometer using inexpensive components.

    I kept if for years and then lost it during a move.

    Does anyone remember it or even have the issue?

    <http://www.americanradiohistory.com/UK/Practical-Mechanics/60s/Practical-Mechanics-1963-05-S-OCR.pdf#search=%22proton%22>

    There is mention of a proton magnetometer, but only in passing, on page 365.

    --
    Jeff

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  • From nick@21:1/5 to pinnerite on Thu Dec 26 23:00:28 2024
    On Thu, 26 Dec 2024 21:56:04 +0000, pinnerite wrote:

    Many Years ago Practical Mechanics ran an article describing the
    construction of a proton magnetometer using inexpensive components.

    I kept if for years and then lost it during a move.

    Does anyone remember it or even have the issue?


    Sorry, no. But because the idea sounded intriguing I've had a little
    furtle around t'internet.

    It seems archive.org has some scanned copies of Practical Mechanics but
    I think you might need to be more dedicated than I to go through them
    without at least a rough idea of the date being looked for.

    Google searches for Practical Mechanics Magazine Proton Magnetometer was typically for Google, pretty useless though there are some links to
    other d-i-y proton magnetometer projects which might be of interest

    Bing.com gave a few leads. Again, not much in the way of PM but I
    particularly liked this one: <https://www.researchgate.net/publication/238742630_Construction_of_a_Proton_Magnetometer>
    which looked clear enough for me to understand and straightforward to
    make from everyday components.

    Hope this helps.

    Good luck

    Nick

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  • From Alan J. Wylie@21:1/5 to nick on Fri Dec 27 08:47:29 2024
    nick <nickodell49@yahoo.ca> writes:

    Many Years ago Practical Mechanics ran an article describing the
    construction of a proton magnetometer using inexpensive components.

    Bing.com gave a few leads. Again, not much in the way of PM but I particularly liked this one: <https://www.researchgate.net/publication/238742630_Construction_of_a_Proton_Magnetometer>
    which looked clear enough for me to understand and straightforward to
    make from everyday components.

    That paper has this reference:

    | 5. L. Huggard, Proton Magnetometer, Practical Electronics, Wimbourne
    | Publishing, U.K.,(Oct 1970).

    And here it is: https://www.worldradiohistory.com/UK/Practical-Electronics/70s/Practical-Electronics-1970-10.pdf

    --
    Alan J. Wylie https://www.wylie.me.uk/

    Dance like no-one's watching. / Encrypt like everyone is.
    Security is inversely proportional to convenience

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Alan J. Wylie@21:1/5 to pinnerite on Fri Dec 27 09:23:24 2024
    pinnerite <pinnerite@gmail.com> writes:

    Many Years ago Practical Mechanics ran an article describing the
    construction of a proton magnetometer using inexpensive components.

    Here's a recent build: https://hackaday.io/project/1376-pyppm-a-proton-precession-magnetometer-for-all

    --
    Alan J. Wylie https://www.wylie.me.uk/

    Dance like no-one's watching. / Encrypt like everyone is.
    Security is inversely proportional to convenience

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From No mail@21:1/5 to Alan J. Wylie on Fri Dec 27 10:46:50 2024
    Alan J. Wylie wrote:
    nick <nickodell49@yahoo.ca> writes:

    Many Years ago Practical Mechanics ran an article describing the
    construction of a proton magnetometer using inexpensive components.

    Bing.com gave a few leads. Again, not much in the way of PM but I
    particularly liked this one:
    <https://www.researchgate.net/publication/238742630_Construction_of_a_Proton_Magnetometer>
    which looked clear enough for me to understand and straightforward to
    make from everyday components.

    That paper has this reference:

    | 5. L. Huggard, Proton Magnetometer, Practical Electronics, Wimbourne
    | Publishing, U.K.,(Oct 1970).

    And here it is: https://www.worldradiohistory.com/UK/Practical-Electronics/70s/Practical-Electronics-1970-10.pdf

    The scan of the magazine - especially the adverts - brought back many
    memories, and the magnetometer theory is fascinating. Thanks for the link.

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  • From Andy Burns@21:1/5 to Alan J. Wylie on Fri Dec 27 11:02:11 2024
    Alan J. Wylie wrote:

    pinnerite wrote:
    Many Years ago Practical Mechanics ran an article describing the
    construction of a proton magnetometer using inexpensive components.

    here it is: https://www.worldradiohistory.com/UK/Practical-Electronics/70s/Practical-Electronics-1970-10.pdf

    Sounds great for finding horseshoes and plough tines ...

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  • From fred@21:1/5 to No mail on Fri Dec 27 11:22:57 2024
    No mail <nomail@aolbin.com> wrote in
    news:lt7espF79bqU1@mid.individual.net:

    Alan J. Wylie wrote:

    That paper has this reference:

    | 5. L. Huggard, Proton Magnetometer, Practical Electronics,
    | Wimbourne Publishing, U.K.,(Oct 1970).

    And here it is:
    https://www.worldradiohistory.com/UK/Practical-Electronics/70s/Practic
    al-Electronics-1970-10.pdf

    The scan of the magazine - especially the adverts - brought back many memories, and the magnetometer theory is fascinating. Thanks for the
    link.

    It's like a time-machine . . .

    . . . . . 15 shillings for a 2N3055, outrageous!

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  • From Clive Page@21:1/5 to Alan J. Wylie on Fri Dec 27 12:26:44 2024
    On 27/12/2024 08:47, Alan J. Wylie wrote:

    And here it is: https://www.worldradiohistory.com/UK/Practical-Electronics/70s/Practical-Electronics-1970-10.pdf

    Thanks for finding and posting that as it brings back so many memories, especially from that wonderful set of advertisements. What a huge number of electronic component suppliers there were around that time. I remember buying components from a few of
    them. And the last one for Henry's Radio with four shops "within 100 yards of each other" in the Edgware Road, which I visited a number of times. It's such a shame that young people can't do that sort of thing any more.


    --
    Clive Page

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  • From Jeff Layman@21:1/5 to Clive Page on Fri Dec 27 14:59:37 2024
    On 27/12/2024 12:26, Clive Page wrote:
    On 27/12/2024 08:47, Alan J. Wylie wrote:

    And here it is:
    https://www.worldradiohistory.com/UK/Practical-Electronics/70s/Practical-Electronics-1970-10.pdf

    Thanks for finding and posting that as it brings back so many memories, especially from that wonderful set of advertisements. What a huge number of electronic component suppliers there were around that time. I remember buying components from a few of
    them. And the last one for Henry's Radio with four shops "within 100 yards of each other" in the Edgware Road, which I visited a number of times. It's such a shame that young people can't do that sort of thing any more.

    I used to spend a lot of time in the "government surplus" electronics
    shops in Tottenham Court Road (Proops, Z & I Aero, etc), and Lisle St in
    the 60s. In the mid 70s I was chatting to a Polish electronics
    technician who, when I mentioned Z & I Aero, told me they were a front
    to sell Russian goods in the UK, and finance certain, shall we say,
    clandestine activities. I never knew what the truth was, but this forum
    thread is interesting <https://www.vintage-radio.net/forum/showthread.php?t=139501>.

    More about Lisle St, here <http://www.retinascope.co.uk/lislestreet.html>

    Those shops disappeared many years ago. About 15 or 20 years ago there
    was a similar type of shop in Worthing (Portland Road maybe?), before
    that too disappeared. The last shop of that type was Burkitt's on Steep
    Hill, Lincoln.

    --
    Jeff

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  • From Alan J. Wylie@21:1/5 to Jeff Layman on Fri Dec 27 15:19:49 2024
    Jeff Layman <Jeff@invalid.invalid> writes:

    Those shops disappeared many years ago. About 15 or 20 years ago there
    was a similar type of shop in Worthing (Portland Road maybe?), before
    that too disappeared. The last shop of that type was Burkitt's on
    Steep Hill, Lincoln.

    H. Gee of Mill Road, Cambridge https://www.cambridge-news.co.uk/news/history/lost-cambridge-electrical-shop-destroyed-28336801

    M&B, 86 Bishopsgate, in the arches under Leeds railway station, with a
    Bren gun in the window.

    --
    Alan J. Wylie https://www.wylie.me.uk/

    Dance like no-one's watching. / Encrypt like everyone is.
    Security is inversely proportional to convenience

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Jeff Layman@21:1/5 to Alan J. Wylie on Fri Dec 27 17:12:31 2024
    On 27/12/2024 15:19, Alan J. Wylie wrote:

    M&B, 86 Bishopsgate, in the arches under Leeds railway station, with a
    Bren gun in the window.

    Disappeared years ago according to <https://www.vintage-radio.net/forum/showthread.php?t=21862>.

    --
    Jeff

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  • From Ian@21:1/5 to pinnerite on Fri Dec 27 17:52:53 2024
    On 2024-12-27, pinnerite <pinnerite@gmail.com> wrote:

    I don't know if you remember Chromasonic Electronics?
    My mate Raymond and I were the proprietors.

    Sure do. You had a fair chunk of my pocket money back in the day :) Still
    got these in the archive:

    https://www.jusme.com/perm/chromasonic.jpg


    Labour's introduction of a higher rate of VAT virtually killed the
    business. A deal was done with HM Rvenue and Customs to glue a rate to different classes of component instead of identifying the appropriate
    rate according to what purpose the product would be used for but it was
    too late, the damage was done.

    Shame.


    --
    Ian

    "Tamahome!!!" - "Miaka!!!"

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  • From No mail@21:1/5 to Jeff Layman on Fri Dec 27 18:02:41 2024
    Jeff Layman wrote:
    On 27/12/2024 12:26, Clive Page wrote:
    On 27/12/2024 08:47, Alan J. Wylie wrote:

    And here it is:
    https://www.worldradiohistory.com/UK/Practical-Electronics/70s/Practical-Electronics-1970-10.pdf


    Thanks for finding and posting that as it brings back so many
    memories, especially from that wonderful set of advertisements.  What
    a huge number of electronic component suppliers there were around that
    time.  I remember buying components from a few of them.  And the last
    one for Henry's Radio with four shops "within 100 yards of each other"
    in the Edgware Road, which I visited a number of times.  It's such a
    shame that young people can't do that sort of thing any more.

    I used to spend a lot of time in the "government surplus" electronics
    shops in Tottenham Court Road (Proops, Z & I Aero, etc), and Lisle St in
    the 60s. In the mid 70s I was chatting to a Polish electronics
    technician who, when I mentioned Z & I Aero, told me they were a front
    to sell Russian goods in the UK, and finance certain, shall we say, clandestine activities. I never knew what the truth was, but this forum thread is interesting <https://www.vintage-radio.net/forum/showthread.php?t=139501>.

    More about Lisle St, here <http://www.retinascope.co.uk/lislestreet.html>

    Those shops disappeared many years ago. About 15 or 20 years ago there
    was a similar type of shop in Worthing (Portland Road maybe?), before
    that too disappeared. The last shop of that type was Burkitt's on Steep
    Hill, Lincoln.

    That surprised me - I worked at John Burkitt's as a Saturday job from
    when I was about 10 through to being about 16. Initially on Steep Hill
    and then on The Strait. 'twas a very long time ago.

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  • From Sam Plusnet@21:1/5 to fred on Fri Dec 27 18:38:12 2024
    On 27/12/2024 11:22, fred wrote:
    No mail <nomail@aolbin.com> wrote in
    news:lt7espF79bqU1@mid.individual.net:

    Alan J. Wylie wrote:

    That paper has this reference:

    | 5. L. Huggard, Proton Magnetometer, Practical Electronics,
    | Wimbourne Publishing, U.K.,(Oct 1970).

    And here it is:
    https://www.worldradiohistory.com/UK/Practical-Electronics/70s/Practic
    al-Electronics-1970-10.pdf

    The scan of the magazine - especially the adverts - brought back many
    memories, and the magnetometer theory is fascinating. Thanks for the
    link.

    It's like a time-machine . . .

    . . . . . 15 shillings for a 2N3055, outrageous!

    1970. When even the capacitors were polyester.

    --
    Sam Plusnet

    --- SoupGate-Win32 v1.05
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  • From Harry Bloomfield Esq@21:1/5 to Alan J. Wylie on Sun Dec 29 10:51:56 2024
    On 27/12/2024 15:19, Alan J. Wylie wrote:
    M&B, 86 Bishopsgate, in the arches under Leeds railway station, with a
    Bren gun in the window.

    They had an associated place, just off Pontefract Lane, Hunslet. On an industrial estate, for years they had an ex-army scout car parked outside.

    --- SoupGate-Win32 v1.05
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  • From Andrew@21:1/5 to Jeff Layman on Sun Dec 29 16:42:54 2024
    On 27/12/2024 14:59, Jeff Layman wrote:
    On 27/12/2024 12:26, Clive Page wrote:
    On 27/12/2024 08:47, Alan J. Wylie wrote:

    And here it is:
    https://www.worldradiohistory.com/UK/Practical-Electronics/70s/Practical-Electronics-1970-10.pdf

    Thanks for finding and posting that as it brings back so many
    memories, especially from that wonderful set of advertisements.  What
    a huge number of electronic component suppliers there were around that
    time.  I remember buying components from a few of them.  And the last
    one for Henry's Radio with four shops "within 100 yards of each other"
    in the Edgware Road, which I visited a number of times.  It's such a
    shame that young people can't do that sort of thing any more.

    I used to spend a lot of time in the "government surplus" electronics
    shops in Tottenham Court Road (Proops, Z & I Aero, etc), and Lisle St in
    the 60s. In the mid 70s I was chatting to a Polish electronics
    technician who, when I mentioned Z & I Aero, told me they were a front
    to sell Russian goods in the UK, and finance certain, shall we say, clandestine activities. I never knew what the truth was, but this forum thread is interesting <https://www.vintage-radio.net/forum/showthread.php?t=139501>.

    More about Lisle St, here <http://www.retinascope.co.uk/lislestreet.html>

    Those shops disappeared many years ago. About 15 or 20 years ago there
    was a similar type of shop in Worthing (Portland Road maybe?), before
    that too disappeared.

    Memories of GWM Radio

    https://www.youtube.com/watch?v=hBBgMeUQgBg

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  • From Jeff Layman@21:1/5 to Andrew on Mon Dec 30 08:46:00 2024
    On 29/12/2024 16:42, Andrew wrote:
    On 27/12/2024 14:59, Jeff Layman wrote:

    Those shops disappeared many years ago. About 15 or 20 years ago there
    was a similar type of shop in Worthing (Portland Road maybe?), before
    that too disappeared.

    Memories of GWM Radio

    https://www.youtube.com/watch?v=hBBgMeUQgBg

    More-or-less as I remember it, although I was there a lot later. The
    back door was, however, open and it was possible to look at the stuff
    stored out there. I don't know if "Les" was still there or not.

    Anyone remember an electronics "surplus" shop in Reading in the 70s? I
    bought an old power supply there (which weighed a ton) to turn into a stabilised supply useful for charging my car's dodgy battery. It had
    eight OC26 transistors on four large heatsinks and a couple of umpteen
    thousand uF smoothing caps. I modified it using a Wireless World circuit
    and it worked well for years, even after one of the smoothing caps died.
    It eventually went for recycling only a few years ago.

    --
    Jeff

    --- SoupGate-Win32 v1.05
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  • From Dave W@21:1/5 to All on Tue Dec 31 21:08:21 2024
    T24gVGh1LCAyNiBEZWMgMjAyNCAyMTo1NjowNCArMDAwMCwgcGlubmVyaXRlIDxwaW5uZXJpdGVA Z21haWwuY29tPg0Kd3JvdGU6DQoNCj5NYW55IFllYXJzIGFnbyBQcmFjdGljYWwgTWVjaGFuaWNz IHJhbiBhbiBhcnRpY2xlIGRlc2NyaWJpbmcgdGhlDQo+Y29uc3RydWN0aW9uIG9mIGEgcHJvdG9u IG1hZ25ldG9tZXRlciB1c2luZyBpbmV4cGVuc2l2ZSBjb21wb25lbnRzLg0KPg0KPkkga2VwdCBp ZiBmb3IgeWVhcnMgYW5kIHRoZW4gbG9zdCBpdCBkdXJpbmcgYSBtb3ZlLg0KPg0KPkRvZXMgYW55 b25lIHJlbWVtYmVyIGl0IG9yIGV2ZW4gaGF2ZSB0aGUgaXNzdWU/DQoNCkkgY2hhbGxlbmdlIHlv dSBvbiB0aGUgbmFtZSBvZiB0aGUgbWFnYXppbmUuIEkgbG9va2VkIHRocm91Z2ggbWFueQ0KaXNz dWVzIG9uIGxpbmUgYnV0IG1vc3Qgb2YgdGhlIHByb2plY3RzIHdlcmUgbWVjaGFuaWNhbCBpbiBu YXR1cmUuDQoNCkkgc3VnZ2VzdCB0aGUgbWFnYXppbmUgd2FzIFByYWN0aWNhbCBFbGVjdHJvbmlj cywgYW5kIGhlcmUgaXMgYSBsaW5rDQp0byB0aGUgaXNzdWUgb2YgT2N0IDE5NzAgd2l0aCBhIHBy b3RvbiBtYWduZXRvbWV0ZXIgb24gdGhlIGNvdmVyLg0KaHR0cHM6Ly93b3JsZHJhZGlvaGlzdG9y eS5jb20vVUsvUHJhY3RpY2FsLUVsZWN0cm9uaWNzLzcwcy9QcmFjdGljYWwtRWxlY3Ryb25pY3Mt MTk3MC0xMC5wZGYNCg0KLS0gDQpEYXZlIFcNCg==

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  • From me9@21:1/5 to Jeff Layman on Wed Jan 1 01:02:45 2025
    Jeff Layman <Jeff@invalid.invalid> wrote:

    The last shop of that type was Burkitt's on Steep Hill, Lincoln.

    Mr Birkitt died a couple of years ago. I gather his children still run
    theshop, sorting through all his stock. It was The Strait, Lincoln.

    --
    braind

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  • From Jeff Layman@21:1/5 to All on Wed Jan 1 09:06:05 2025
    On 01/01/2025 01:02, me9 wrote:
    Jeff Layman <Jeff@invalid.invalid> wrote:

    The last shop of that type was Burkitt's on Steep Hill, Lincoln.

    Mr Birkitt died a couple of years ago. I gather his children still run theshop, sorting through all his stock. It was The Strait, Lincoln.

    Thanks for the corrections to the name and address! It was over eight
    years ago that I visited Lincoln - good to know that the shop's still there.

    --
    Jeff

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  • From Andy Burns@21:1/5 to All on Wed Jan 1 09:49:26 2025
    me9 wrote:

    Mr Birkitt died a couple of years ago. I gather his children still run theshop, sorting through all his stock. It was The Strait, Lincoln.

    The sign in the window back in August shows they are open 2.5 hours a
    day, on 4 days a week.

    <https://maps.app.goo.gl/uMK7J4NXG9iAeZ6T9>

    --- SoupGate-Win32 v1.05
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  • From tony sayer@21:1/5 to All on Thu Jan 2 12:19:45 2025
    In article <87a5ch5f1m.fsf@wylie.me.uk>, Alan J. Wylie
    <alan@wylie.me.uk> scribeth thus
    Jeff Layman <Jeff@invalid.invalid> writes:

    Those shops disappeared many years ago. About 15 or 20 years ago there
    was a similar type of shop in Worthing (Portland Road maybe?), before
    that too disappeared. The last shop of that type was Burkitt's on
    Steep Hill, Lincoln.

    H. Gee of Mill Road, Cambridge >https://www.cambridge-news.co.uk/news/history/lost-cambridge-electrical-shop- >destroyed-28336801


    That place, where i spent most all of my pocket money, looks like its
    being rebuilt after being sold tho i very much doubt it'll be back at
    H.Gee mores the pity!...

    It must have contained all the drive belts for every type of cassette
    recorder ever made!...



    M&B, 86 Bishopsgate, in the arches under Leeds railway station, with a
    Bren gun in the window.


    --
    Tony Sayer


    Man is least himself when he talks in his own person.

    Give him a keyboard, and he will reveal himself.

    --- SoupGate-Win32 v1.05
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  • From Harry Bloomfield Esq@21:1/5 to Jeff Layman on Thu Jan 2 13:31:42 2025
    On 30/12/2024 08:46, Jeff Layman wrote:
    Anyone remember an electronics "surplus" shop in Reading in the 70s? I
    bought an old power supply there (which weighed a ton) to turn into a stabilised supply useful for charging my car's dodgy battery. It had
    eight OC26 transistors on four large heatsinks and a couple of umpteen thousand uF smoothing caps. I modified it using a Wireless World circuit
    and it worked well for years, even after one of the smoothing caps died.
    It eventually went for recycling only a few years ago.

    I designed/built my own, using a toroid transformer. It would pulse
    charge - It would turn on, pulse a charge, turn off, and check the
    battery volts, which determined how long the next on pulse would remain
    on for. Current when on, was 20 amps. It worked very well, and would
    rapidely be able to start a car, from a flat battery, or top a battery
    up, without over charging.

    --- SoupGate-Win32 v1.05
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