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Vintage Telephony and Telecomms Vintage Telephones, Telephony and Telecomms Equipment |
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1st Nov 2019, 11:36 pm | #1 |
Triode
Join Date: Nov 2019
Location: Cambridge, Cambridgeshire, UK.
Posts: 36
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Telephone Set "F" MK II questions
I have a pair of Set F Mk II, one TMC, one GEC which I'm trying to get operational. They both ring from one to the other - except one has lost its clanger. Both ear pieces seem to work, but I can only speak from one to the other. So I want to check out one of the handset microphones.
Q.1. I've wired Earth to Earth, and L1 to L1, is this right? Q2. How do you get the microphone out of the handset? I can't seem to unscrew it. There is a little play then it stops. I can't pull it. Don't want to break it after 75 years. Thanks, Ben |
2nd Nov 2019, 6:04 am | #2 | |
Dekatron
Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 5,208
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Re: Telephone Set "F" MK II questions
Quote:
Look for a small hole in the side of the mouthpiece, on the side pointing towards the earpiece. Put a small tool in there and press to release the catch, hold the tool in, then turn the mouthpiece anticlockwise and it will come off. |
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2nd Nov 2019, 11:06 am | #3 |
Dekatron
Join Date: Jul 2007
Location: Penrith, Cumbria, UK.
Posts: 3,687
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Re: Telephone Set "F" MK II questions
Have you tried swapping the handsets over to see if the fault carries with the handset? They just unplug on the four-pin jack.
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Regds, Russell W. B. G4YLI. |
2nd Nov 2019, 11:19 am | #4 |
Triode
Join Date: Nov 2019
Location: Cambridge, Cambridgeshire, UK.
Posts: 36
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Re: Telephone Set "F" MK II questions
Thank you Tony. That works a treat. I had tried that but didn't push hard enough. I'll do some test now. Should have said its a YA2636 handset.
Russel, yes, tried that and it does go with the handset. More tests now! |
2nd Nov 2019, 11:54 am | #5 |
Dekatron
Join Date: Feb 2005
Location: West Cumbria (CA13), UK
Posts: 6,127
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Re: Telephone Set "F" MK II questions
It is also worth checking the health of the battery in the one whose transmitter (microphone) isn't working - though first try Russell's suggestion of swapping handsets first to confirm whether the problem lies with the handset or the main unit.
Do your units have buzzer units? This can be established by checking whether the plug-in unit in the right-hand lobe of the body is an enclosed unit with two knobs on top (buzzer) or an open unit containing just an induction coil (no buzzer). If one or both have buzzers, try pressing the button on the front right-hand side to the left of the handset plug and checking whether the buzz is audible in the other handset. This will have the dual effect of checking the battery health of the initiating set and that the receiver in the other set is operational. If only one has a buzzer, then try swapping the handsets and repeating to check the second receiver. edit: (presumably owing to need for moderator approval on initial posts) Ben's second post hadn't appeared when I made my post, so forget battery checks. It is still worth checking whether the problem lies with the transmitter or receiver. In the absence of a buzzer, the receiver can be checked by connecting a low-voltage battery across the inner two prongs of the handset plug - with the handset unplugged from the main unit.
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Mending is better than Ending (cf Brave New World by Aldous Huxley) Last edited by Dave Moll; 2nd Nov 2019 at 12:00 pm. |
2nd Nov 2019, 8:18 pm | #6 |
Heptode
Join Date: Jan 2008
Location: Hakadal, Norway
Posts: 643
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Re: Telephone Set "F" MK II questions
Hi, I had one of those with a defect transmitter capsule. when you think about the age, that is not strange. I took a carbon transmitter from a newer phone, and soldered 2 wires on it and used that. I have now sold that one since I could get a better one, and did not have any need for 2.
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2nd Nov 2019, 10:34 pm | #7 |
Triode
Join Date: Nov 2019
Location: Cambridge, Cambridgeshire, UK.
Posts: 36
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Re: Telephone Set "F" MK II questions
Thank you Dave and Dags
It's all working! I cleaned up the connections and tightened screws, checked the capsules, and now it works just fine. Using 2 x AA on each phone. It's a non-buzzer type. Just need to find a couple of spares now. I'll post in the wanted section. As to restoring some more: Would you polish the bells? Or would that destroy the aged look? Do people care? Thanks for all your help on this, my first visit to this forum. Regards, Ben |
3rd Nov 2019, 8:15 pm | #8 |
Heptode
Join Date: Sep 2009
Location: Tonbridge, Kent, UK.
Posts: 686
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Re: Telephone Set "F" MK II questions
The bells would not have been polished in field service, not very tactical! But in the days of National Service, if it moves salute it, if it doesn't paint or polish it.
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3rd Nov 2019, 9:30 pm | #9 | |
Dekatron
Join Date: Jul 2007
Location: Penrith, Cumbria, UK.
Posts: 3,687
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Re: Telephone Set "F" MK II questions
Quote:
Any 'F's I have are chrome-gonged, with rather a rough matte finish on them. I tried polishing one as a kid, when I had a couple (£1.50 each I paid with new-fangled Decimal Currency!) but it didn't make much difference. I didn't have a buffing wheel, though.
__________________
Regds, Russell W. B. G4YLI. |
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6th Nov 2019, 11:03 pm | #10 |
Triode
Join Date: Nov 2019
Location: Cambridge, Cambridgeshire, UK.
Posts: 36
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Re: Telephone Set "F" MK II questions
Thanks for the input, I'll give them a tidy and post some pics.
Regards to all, Ben |
7th Nov 2019, 11:19 pm | #11 | ||
Heptode
Join Date: Jul 2007
Location: Flintshire, UK.
Posts: 707
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Re: Telephone Set "F" MK II questions
Quote:
The Tele F was used to below Divisional Level. There was a metal plate with curled up 'sides' and a webbing strap used to clamp the Tele F on a flat surface in vehicles - it was used without the wooden box in that case. Ian J one-time Lt. R.Signals, serving with none other than the Earl Kitchener of Khartoum it was that long ago ! |
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12th Nov 2019, 10:37 pm | #12 | ||
Nonode
Join Date: Oct 2014
Location: West Midlands, UK.
Posts: 2,181
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Re: Telephone Set "F" MK II questions
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