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Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment. |
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30th Sep 2018, 1:33 pm | #1 |
Retired Dormant Member
Join Date: Sep 2018
Location: Northampton, Northamptonshire, UK.
Posts: 2
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Yaesu FT102 no TX
Hi,
My 102 has no transmit, new PA stage with valves new RF valve all relays seem to be operating, voltages are present OK on plate and screen grids, can anyone help me ? Reg G4VWF |
30th Sep 2018, 7:55 pm | #2 |
Heptode
Join Date: Jan 2008
Location: Birchington Kent, UK.
Posts: 596
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Re: yaesu FT102 no TX
Hello Reg
A few questions: Does the PA current appear to be 'right'? Does the lack of output power happen in all modes, even in tune mode? Is there a satisfactory 'click' from the relays when using the PTT? I have an FT102, but its some time since I gave it an airing. The number one cause of trouble with these, as I'm sure you're aware, is relays. Mine came to me with a duff antenna change-over relay. At the time, these were available from the dearly departed Maplin. Regards Pete |
30th Sep 2018, 8:59 pm | #3 |
Dekatron
Join Date: Aug 2007
Location: W.Butterwick, near Doncaster UK.
Posts: 8,935
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Re: yaesu FT102 no TX
Knowing what the relays are like,might be worth a dowsing in De-Oxit.
Welcome to the forum!
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23rd Oct 2018, 11:13 am | #4 |
Retired Dormant Member
Join Date: Sep 2018
Location: Northampton, Northamptonshire, UK.
Posts: 2
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Yaesu FT102 RF relay
Can anyone help me with the connections for the RF relay that resides alongside the 6146 valves in the PA compartment? I need a few good photos to show how it is connected, if anyone can help me I would be eternally grateful, please ground the anodes before getting near as high voltages can lurk in here, but it only takes a couple of minutes to remove top cover and lid on the PA compartment, I really need help and am politely asking for it.
Another "old git" G4VWF. 80 years old. |
23rd Oct 2018, 11:00 pm | #5 |
Heptode
Join Date: Jan 2008
Location: Birchington Kent, UK.
Posts: 596
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Re: Yaesu FT102 no TX
This is the drawing I made when replacing the antenna relay on mine.
Sorry, but didn't take any pictures. |
23rd Oct 2018, 11:37 pm | #6 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,902
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Re: Yaesu FT102 no TX
Someone, somewhere may have several dozen of those relays sold off in a bag at the end of Maplin.
David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done |
24th Oct 2018, 7:19 am | #7 |
Nonode
Join Date: Jun 2013
Location: Surbiton, SW London, UK.
Posts: 2,801
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Re: Yaesu FT102 no TX
The three band switch spindles are linked by couplers. These sometimes work loose
meaning the switch contacts don't line up on the correct band so check these. |