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Here is an update on the LED channel selector for the Telstat 140. When I was trying to fix this if I touched the pc board or twist the selector some of the digits would come back and work but then go back out. Then 1 time on the pc board is 2 -1.8k resistor arrays 7per array. Even touching...

Hi Night Stalker10 Yes the DDS are way over priced and if you want installed its another $150.00. Look a 40up and 40down kit is all you need for extra channels after that no one is on those channels. So now I have a good working ssb base but the channels display need replaced. I hope someone...

Thanks Brandon yes I know I brought up the DDS modules. This selector has no ribbon cable just 7 wires from the bottom pc board and run over to the chassis where there are 7 post the the nine wires are wire wrapped to. This is one of the few radios where they used a wire wrap gun to make...

Looking for a Telsat ssb 140 radio for parts. part im looking for is the channel selector with pcb boards attached. I tried to fix mine 4 times and still segments out I will try 1 more time, so needing the channel selector. If someone knows of the selector used in other radios please post...

Well I just read up on the DDS encoder module for price and install, way to much in price and way to much to install. Price around $125.00 and i install About 5 PDFS to read up on install and how to get it to work. On a 148GTL about 50 parts to remove. Crazy on not doing that. Im looking for...

Hi Brandon. They do have the DDS modules where u replace the complete channel selector with an encoder and module Im sure you have seen them I will have to check on a price if I cant find a good used selector for the Telsat 140

Nomad yes there is 3 sections with 2 sections up and 1 section down. I took the complete assembly apart 4 times and opened each section and cleaned the wafer and all the prongs I lightly filed each one prong just to clean the tips and looked under a scope to see if any tips were bad all looked...

Are you still on this forum

Back at the second telsat ssb140. Seems the channel display is bad meaning some segments are out and I replaced the LED and same results. I re-flowed all the solder joints and its definitely the wafer selector switch. If i push on the switch some segments do come back or play with the rotary...

Brandon7861 thanks on the heads up of ct 4, I printed out the alignment page and adjusting ct-4 now has the radio spot on on Am LSB USB thanks again for the help

So i did fix the first Telstat 140 power problem now I have a second one. Transmits fine good audio and power both AM and ssb. Problem is Am is dead on USb is dead on Lsb is not If I transmit on AM say 27.4050 dont touch the clarifier and switch to LSB I get 27.4028 when i should get 274040...

So i installed the supply tonight about 30 minutes and all is good. At peak power it drops about 1/10 of a volt pretty steady. This supply is a 5 amp 12v which adjusted to 13.11 volts Supply is a 12v @5amps and cost $7.00 shipped from amazon

mitsubishi 2sc2166 and 1969

I replaced the finals with new HG replacements

I replaced the regulator 2sD525 Q3 and still same results On to ordering the 2 zener ZD1 and Zd2 And Q1 and Q2 I checked the resistors and all seem within specs. Something is draining about 2 volts and as I mentioned the transformer is also dropping about 2 volts AC when keying mic on AM and SSB

Nomad you mentioned the chinese PS I was thinking of getting one to install plenty of room in the radio if i remove the transformer

I replaced the 2 caps and still the same results. I will check the regulator again or replace and also the zener diode. Will also replace the D525 regulator

here is an update on this ssb 140 telsat. I have run the radio on the 12v plug and all seems good 5 watt AM swings to about 10 watts and ssb about 13 watts. When run on AC I get about 4 watts Am very little swing and ssb about 6-8 watts max. I checked the Ac power supply and its dropping about...

Well i received brand new finals HG 1969 and 2sc2166. I installed in radio and same low SSB power and little swing on AM. Actually about 2 watts less on sideband 6 watts. Am about 5 watts and peak to 6 watts. Saying Ah on ssb i get about 3 watts and if i whistle i get about 8 watts max. I...

Here is the block diag. Gonna check transistor Q35-37-38 and see if 1 of these might be the culprit Q38 is the ssb ALC