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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

https://elektrotanya.com/midland_13-892_sch.pdf/download.html#dl I believe this radio is relay based and based on what you describe, most probably the relay is dirty or bad..heres the schematic, relay is at the bottom right..

Finally I got 10 watts CW with the autotune procedure but it didnt match the dummy load..I think I found why..the dummy load never screwed completely to the radio ant SO..so I decided to replace it..opening the bandpass board, I saw this very thin crack around the corner screw..the ground loop...

Removed the VCO2 top, adjusted TC1 to 5.64 volts, its now RX well at all bands! Was scared a lot, theres a continous alarm beep until TC1 is within operating specs..turn very slowly! just like adjusting a 148 1st gen VCO!

thks!! Got 0.7v at TP3 next to the VCO2 box..its supposed to have at least 4.0.. rechecked again at all bands, same thing 0.7v..funny thing is the radio was perfectly RX at all bands 2 hours before

The snakes head finally showed itself.. I hooked the radio to a new car battery.. Did the atu procedure, same thing warning beep..then I reset the radio with Power on and A=B..I had my DMM reading current, reads 1.32 RX..while I was selecting 10 meter band, I was hearing some chat, then it...

I was surprised this radio has a ATU..the model is a TS450S..it also has the SSB filter! that filters seems to be very rare and expensive, looking around the net..

also the 50 was pep, i guess it was 20 watts deadkey..

thks BJ..then Ill rig a car battery and a trickler..I do have a Tripplite 25 but its bad, loud sounding buzz and it cuts off, that buzz indicates bad transformer..i was thinking about using a 825 watt ATX PSU, but reading about using these psus for ham radio is not recommended .