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Old 22nd Feb 2019, 9:46 pm   #1
ms660
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Radio frequency liner, intermediate frequency liner, terms I have only just come across in all my years in this game.

Lawrence.
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Old 22nd Feb 2019, 9:48 pm   #2
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Never heard the term. What does it mean
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Old 22nd Feb 2019, 9:50 pm   #3
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Check out Bulgin:

http://www.air-ministry.uk/1937guide.pdf

Courtesy of GMB's website.

Lawrence.

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Old 22nd Feb 2019, 9:52 pm   #4
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Default Re: Liners

Only ever heard 'Liner Amplifier' from people meaning linear amplifier.

Oh, and the Belcom Liner-2 a low-cost VHF amateur radio transmitter with a remarkably filthy output signal.

David
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Old 22nd Feb 2019, 10:03 pm   #5
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I'd never heard the term either, but I've just looked in my Bulgin catalogue for 1938 and there they are!
I'll scan the relevant page tomorrow, it doesn't tell us much more, but refers to their use as 'lining up Intermediate Frequency Transformers'

Andy
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Old 22nd Feb 2019, 10:34 pm   #6
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Never heard the word in a radio context, but I do have a 3/4 ton Liner dumper.
Les.
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Old 22nd Feb 2019, 11:41 pm   #7
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Interesting. My 1936/37 Bulgin catalogue only lists the V.T.17 465 K.C/S "Liner" (@ 12/6d). Quotation marks in the original, so possibly it was a newly-coined word. Sales were presumably positive, in view of the increased range of liners (and higher price) in the 1937/38 guide.

n.b. While the 1937/38 guide only refers to use on DC, the 1936/37 catalogue says that the V.T.17 can be used on " DC or AC mains of 200- 250 volts (any periodicity). ".

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Old 23rd Feb 2019, 12:58 am   #8
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Spot frequency signal generator for aligning IFs, I've seen then called a modulated test oscillator too.
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Old 23rd Feb 2019, 9:13 am   #9
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Never heard the term before how interesting.
Cheers
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Old 23rd Feb 2019, 11:41 am   #10
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An abbreviation of "Liner Upper" presumably?
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Old 23rd Feb 2019, 12:02 pm   #11
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The word and its meaning sound American to me.

Al.
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Old 23rd Feb 2019, 12:49 pm   #12
M0FYA Andy
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This is the relevant page from the 1938 Bulgin catalogue. I wonder what was inside the metal can of the Liner?

By the way, how do others pronounce the word 'Bulgin'? I've always said it to rhyme with 'begin', but others I know say it to rhyme with the stuff you put in your tonic. What did Mr. Bulgin call himself?

Andy
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Old 23rd Feb 2019, 1:40 pm   #13
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Reminds me of the old joke:
1st. tech.: "That capacitor needs replacing!"
2nd. tech.; "Why?"
1st. tech.: "Just look at it! It's bulging!"

Al.
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Old 23rd Feb 2019, 2:27 pm   #14
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Here's a scan of the only Liner listed in the 1936/37 catalogue. It says that it uses a neon bulb to determine the frequency and, unlike the 1937/38 and 1938 catalogues references, is operable on either AC or DC mains voltages. Presumably redesigned for economy as a suitable DC supply would always be available to the user.
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Old 23rd Feb 2019, 3:18 pm   #15
M0FYA Andy
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That's interesting, I'd always associated neon 'relaxation oscillators' with much lower frequencies, but it does explain why so little power was required by the unit, with no valve heater/filament.
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Old 23rd Feb 2019, 3:22 pm   #16
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Quote:
Originally Posted by M0FYA Andy View Post
That's interesting, I'd always associated neon 'relaxation oscillators' with much lower frequencies, but it does explain why so little power was required by the unit, with no valve heater/filament.
It will be low frequency (the modulation frequency) the neon supplies the energy to keep the tuned circuit going at a low frequency rate.

Lawrence.
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Old 23rd Feb 2019, 4:36 pm   #17
M0FYA Andy
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Good thinking, Lawrence, that makes sense.

Andy
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Old 23rd Feb 2019, 4:53 pm   #18
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Here's a homebrew version article, the Neogen...Book page 729:

https://www.americanradiohistory.com...RC-1963-05.pdf

Lawrence.
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