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This is the same dilema that the M0nka project has..it relies on very specialized Mitubishi mosfets and they are getting scarce..Ive been proposing them to consider to propose a procedure to replace those with generic IRF520..

since you mentioned it was half stuck on TX, I would check the TX/RX pin diodes..these are the main relay on this radio

Hi! long time! After troubleshooting the ATU per the online procedure...everything is good! nobody told me the atu has a limited range (3:1)! pretty happy with the rig..thanks BJ..

not having an analyzer, what negative effect it might have, counterpoise wrapped like that?

its made with soft steel brake line, and the radial are soft metal from the beach chair..each leg is 2.5 long and 8 turns of insulated copper wire, the rest is left hanging.. its 1.2 from Ch. 1 to 27.495

it went private..pay for play

I never had trusted switching psus..they rely too heavily on a clean AC input..which were I live, its mostly unlikely..all my computers have been struck by brownouts and these psus dont tolerate that...by the time a decent battery backup decides to help, its already late..

1994ish Christmas Eve.. a FT-980 at 50 watts and a 3 element Yagi around 30 feet above ground.. 28.459mhz Puerto Rico to New Zealand.. we talked around a hour..he sent me a QSL card..

This radio was found at a garage sale..Channel display was flickering, some Deoxit fixed that..otherwise this radio is walking legal at 4/12 watts and it seems it was never tinkered..but compared to my Teaberry Ranger T and the TS-450, its quite soft at receive..Public Address output is very...

if you raised those core beyond the top, then theres another issue..I would check the relay first..

Seems like the original owner was using a desktop or PA microphone..one of the red wires is soldered around the mic audio preamp stage..probably was using a foot switch connected to the radio mic plug..

not a RF tech, mostly audio stuff.. This remembers of those nasty Class H Technics amps, that blew non crossover speakers like nothing, welcome to copper coil smoke..those ICs were supposed to open in-chip diodes, but what I saw was 56 volts DC at the speaker connectors..

ok, may have found possible problems..its seems the tuner coax rf lines have been pulled by the sleeve, the inner pins wouldnt insert fully to the rf sockets..I dont know if these lines are available around, highy doubt it..gonna have to risk fixing that myself.. then we got very hard to turn...

Following BJs forwarded articles, I believe this tuner is bad in terms of not detecting SWR..When I press THRU and Send to check SWR on a dummy load, I get 1.5 from 29 to 3.5..If I press Auto and AT TUNE, gears keep jiggling, doesnt turn fully either way..If I move the outer bottom plastic cog...

fixed the ground issue..upto now, Im getting 10 watts at 1.5 swr at all bands without the ATU..if I turn on and use the ATU, I get the warning beep..which makes me confused..Im supposed to expect 1.1 with the dummy..does the TS 450 SWR function calibrates itself?

great plan!

run a wire from your - battery post to the the antenna mounts..

your radio has a 1306/1307 RF transistor pair, and these are worth gold..probably more than the radio itself..always watch your current at the DC connector and feel for hot spots at the back..

no problem..we are here to help..

learning RF stuff