24 May 2022 - Finished and painted!
23 May 2022 - I have the unit tuned for 6 meters - little output but happy it's working. I have started painting the cabinet.
7 May 2022 - changed out an unsafe 10 ohm resistor - before photo first and after in second photo. Obviously someone thought the electrical tape was safe - NOT!
6 May 2022 - Replaced 6DR7 modulator, 7189 Buffer/Mult., and finally 12AX7 Speech Amp and I have good power on all bands and modulation on AM after some rewiring of the microphone jack. The 12AX7 was replaced with a nice 12AX7a which should provide better fidelity. Next I am gong to replace some of the poorly done work on the 10 ohm resistor near the power supply and clean the chassis as best as I can. Below is a video of the AM from the T-150 received by my 705 and a schematic.
\18 April 2022 - Looking at tubes. Also removed the relay and socket (near OA2 tube).
18 April 2022 - Re-tested - 80 watts on 80M!
I took a second look at my BIRD meter - when I last used it I was testing my 1296MHz transverter and still had the slug in it for that range (DOAHH!) - using the HF slug I was able to see power and peaked the transmitter on CW to 80 watts.
17April 2022 - TX Test - there is life!
I removed all the connections to the relay (not an original part) and I removed the other two original coax connectors.
Keying in CW produces the signal below on my SA at nearly the right frequency on the dial - I'm TX'ing into a dummy load and receiving on a small rubber duck on the SA.
No power is read on my BIRD meter - will check it tomorrow.
13 April 2022 - Power UP - no explosions.
First I wanted to fix the the band selector - it was extremely hard if not impossible to move - some contact cleaner fixed that.
I did not attempt to transmit - just powered it up slowly on the isolation transformer. Next time I will check the tubes and replace as necessary and try to transmit some CW.
12 April 2022 - New eBay buy - Knight T-150 Ham Transmitter
