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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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14th Jan 2023, 9:03 pm
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#1 |
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Diode
Join Date: Jan 2023
Location: Hamilton, Ontario Canada
Posts: 5
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Yaesu FT-200 No Transmit Problem.
I'm attempting to restore an FT-200 that has been idle for over a decade.
The receive works well, but I'm unable to make the unit transmit. Is there a resource that someone can point me to that may help me diagnose the issue? I think I've exhausted my web search for appropriate materials. I've found a few manuals and articles, but nothing that has helped me diagnose the issue. Alternatively, (and even better) has anyone had a similar issue with Yaesu equipment from that era. Thanks in advance. Joe VE3UKY |
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15th Jan 2023, 1:02 am
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#2 |
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Heptode
Join Date: Jul 2018
Location: South Coast, UK
Posts: 730
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Re: Yaesu Ft-200 No Transmit Problem
Relays are a problem. You have to know how to clean them properly, look for FT901 repair video's. It should help
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"Behind every crowd, there's a silver Moonshine" |
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15th Jan 2023, 2:15 am
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#3 |
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Diode
Join Date: Jan 2023
Location: Hamilton, Ontario Canada
Posts: 5
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Re: Yaesu Ft-200 No Transmit Problem
Thanks for the response. I cleaned one of them, suspecting that to be the problem. That didn't solve the issue. I'll clean the second relay tomorrow to see if that works!
I'll let you know if it works. |
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15th Jan 2023, 8:56 am
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#4 |
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Hexode
Join Date: Mar 2006
Location: Helston, Cornwall, UK.
Posts: 278
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Re: Yaesu Ft-200 No Transmit Problem
Do you have the link on the octal plug on the back panel in place?
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15th Jan 2023, 11:20 am
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#5 |
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Diode
Join Date: Jan 2023
Location: Hamilton, Ontario Canada
Posts: 5
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Re: Yaesu Ft-200 No Transmit Problem
Yes, the accessory plug is inserted.
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15th Jan 2023, 1:58 pm
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#6 | |
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Diode
Join Date: Jan 2023
Location: Hamilton, Ontario Canada
Posts: 5
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Re: Yaesu Ft-200 No Transmit Problem
Quote:
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15th Jan 2023, 6:36 pm
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#7 |
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Heptode
Join Date: Jan 2011
Location: Croydon, London, UK.
Posts: 597
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Re: Yaesu FT-200 No Transmit Problem.
There could be any one of a number of things causing your trouble. More information is needed to give any useful help.
Are the relays operating when you press the PTT and does it stop receiving when you try to transmit? Does the meter reading indicate that the PA is drawing current? The more information you provide, the better the quality of any help will be! Paula |
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15th Jan 2023, 6:38 pm
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#8 |
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Moderator
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 19,896
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Re: Yaesu FT-200 No Transmit Problem.
It would be useful to know what test equipment the OP has.
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Graham. Forum Moderator Reach for your meter before you reach for your soldering iron. |
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16th Jan 2023, 2:22 pm
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#9 | |
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Dekatron
Join Date: May 2010
Location: Manchester, UK.
Posts: 3,616
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Re: Yaesu Ft-200 No Transmit Problem
Quote:
OK that has a link to make the PA heaters work There also needs to be another dummy plug in the B7G "EXT VFO" socket, or the internal VFO won't work. If it's missing, its easy to make one. Here is my original one. looks like pins 1,2 &3 are linked and a 330 ohm between 4&5.
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-- Graham. G3ZVT Last edited by rambo1152; 16th Jan 2023 at 2:51 pm. |
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16th Jan 2023, 9:20 pm
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#10 |
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Diode
Join Date: Jan 2023
Location: Hamilton, Ontario Canada
Posts: 5
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Re: Yaesu FT-200 No Transmit Problem.
Thanks to all for your suggestions. I cleaned the relays, changed out capacitor C55, which is problematic in this radio, and cleaned all of the tube and socket contacts. There were also a couple of poor solder connections. Once this was done, the transmit function came back to life.
73! |
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