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Working through a TS440S that I bought off ebay that had some of the glue problems in the VCOs and radio presented with DOTS problem. Previous owner had scraped out glue and touched up back of VCO 5 solder joints but residue ate through some components so I replaced/fixed where necessary...

Thanks Nomad, really appreciate your helps as always. 1N4148 is going in tomorrow morning!

Repairing a kenwood ts440s with the famous glue corrosion issues. Few of the components had legs eaten off and I am just working through it (dots issue) Wondering If i can use a 1N4148 in place of MA858?. I can half solder off the remaining partial leg of the working MA858 if a 1N4148 does not...

Sorry for the delay in reply. For some reason I didn't see your post earlier. I'll have to check if I get notifications. If you do a search on youtube for "Ham Radio - Kenwood TS-430S Maintenance and Adjustment" by Frank Evoked he has a great video on maintenance including removing the RF...

If you can hear it on the other radio chances are the pre driver/driver is working and the final is blown or final bias circuit problem. Could be an easy fix if it was just the final.

Thanks 9C1Driver, I'd rather the Toshibas but RFParts does not ship to Australia hence my HG2290s based on what seller posts to me, they are at US$32 each with US$30 Shipping and they will be matched.

I agree with Hawkeye351, I'd bias to 50ma for the 2sc1969.

Thanks Nomad, I'll update this thread in a couple of weeks once they arrive and I'll let everyone know how they go.

As an idea, I would check bias of driver and final to see if they are in ballpark ma. Especially the final from what you said. I had an blown (read open carbon track carbon trimmer) in the bias circuit of Realistic Navaho TRC490 (pc385) that was acting similar and everyone helped me work it out...

BTW, Has anyone here used the HG2290s and if so do they bias bias differently to Toshibas? (I get what Brandon is saying re: bias above) I think I'll place my order anyway but I just would of liked a bit of feedback from someone using them.

ok I found an ebay seller in USA that posts matched HG2290s to Australia for similar price as it turns out ICA manufacturing web page above only ships to USA and Puerto Rico....

Thanks brandon, I've seen that page and its definitely my cheapest option I found online being matched HG's. I think I'll do that, I just hope the stock biasing will suit them. Agreed, I will definitely check the circuit surrounding them before firing it up. That would suck to destroy the new...

Thanks Brandon as always for your advice. So your saying in series with the main power supply running the whole radio? I kept reading like that in the service manual but it messed with my head. With some of the online prices I'm unsure. The HG2290 matched is probably my cheapest option if...

Hey Guys, I picked up a cheap TS430S for a bargain and have fixed the RX and am now working on the low transmit power. Looking at the RF final board I can see mismatched finals, one is a Toshiba 2sc2290 and the other is a Motorola Trio SRF1174 (926) pink dot. The SRF1174 is showing a base to...

Thanks for the comments guys. Shadetree Mechanic: Just confirmed what you said with the input transformer grounded. Oh well class C it is! Thanks for letting me know. I'm really good at buying stuff that just isn't quite what I'm after. It was cheap enough, paid less then what the MRF455 is...

Bought this yesterday locally. Was pretty excited to get what I thought was a 2 pill amp (from my google searches) thinking 100w pep on ssb here we come! Opened the covers this morning to see its a single pill MRF455. Most of my online searchs show a more modern version I think from the early...

Just a quick update: Transmit is 100% working!!!! After months going around in circles spending an hour here and there tracing voltages and testing components that all checked out good I worked out Q22 [SWITCH] base was not getting its 0.7v on TX and I kept loosing the voltage for it on the...

Fair enough. If you wanted to do that distance a 9 foot whip mobile would work his end but I would just build a half wave dipole for a couple of bucks for him and string it vertically if you are already running a vertical polarized antenna.

You would easily do 7 miles on SSB with good antennas. Back in the day a bunch of us locals on SSB talked 30+ miles away (using base antennas) that would of been impossible on AM. That was mixed terrain, few big hills plus flat open areas. I've always thought SSB had more range then AM.

Thanks guys as always. Thanks Nomad for the extra info as well. Was wondering about all that. I think I'll pass then because that's my worry: how do I even know its accurate or would work for what I want to do. I guess I'm always looking for a bargain!