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I'm having trouble understanding what is going on in the switching and distribution of the voltage for AM TX. Looks like TR41 and TR42 are involved, but when I'm looking around there are a BUNCH of transistors that are related to those two. Do I just go through and check them all out one by...

So the spec sheet says SSB output is supposed to be 12 watts....and it shows 8 watts max when pushing modulation. I bumped it up to 14 if I really whistle. During "normal" modulation it swings between 7-10 on the meter. I really doubt the final will suffer at all at this level.

Robb: You are correct, that schematic IS the correct one. What has changed is some of the part numbers of the components.....which has me confused for a few. I'm back on track and will be working my way back to where the voltage is incorrect. As that point I hope I find the culprit...

Voltages on TR41 and TR42 are not correct. The schematic / service manual and my radio don't match completely.........trying to figure out what is what. Thanks for the inputs...........I gotta step away for a while and take a break.

I received my Grant 2 last week shipped from Thunderpole in the U.K. I had to do some U.S. Customs paperwork for the UPS broker but it got released. Expensive radio but it is NICE. I was a little disappointed in the power output on SSB.......it peaked out at 8W. I little twist of the ALC...

So I checked out the voltage at the finals........ TR36 It has 0V on the pin it should have 7.2V on during X-mit TR38 It has 0V on the pin it should have 7.2V on during X-mit This thing swings almost 20 watts on SSB so the finals are working properly in the SSB mode. The...

Radio DOES HAVE AM receive so I'll check TR36 and TR38 and report back. Thanks ! !

No more recommendations?? The radio performs surprisingly well on SSB.....but will not transmit in AM. I did replace the AM power transistor..............same condition. Microphone checks out o.k. No power output, no S/RF movement when keyed. Any other ideas GREATLY appreciated !

Did that already........... Keep the suggestions coming ! !

First of all, I know all about the new 148gtl and the reputation it has. I got two N.I.B. units for nothing......so I'm experimenting to make them "work" as they should. One radio actually works quite well, but the other works well only on SSB (Upper and Lower) but on AM it puts out very...

Just took a look at that link. That's what you need. They are drying up......better snag one!

Galaxy N Kit is the way to go.......if you can find one. Doesn't use crystals.....its all ic driven. I've installed several on these radios and they work very well.

Mine is sitting in the corner of my radio room waiting for a channel expansion. Nice radio......but needs to be able to motivate north of channel 40. Anxiously awaiting....

I had to do more broad banding to make it work. I followed the suggested modifications and performed the following: 1. replaced emitter resistors on two stages from 1K to 220 ohms. 2. Put capacitance diode across D-25. 3. Re-routed the connectioms to and from the L13 coil per instructions...

To answer your question: No, I did not cut any traces around the coil. I hooked it up according to the half-ass pictures included with the instructions that came with the kit. It was a really rotten photocopy and the picture was NOT clear around the mixer at all. Between the instructions...

Pushbiker256: thanks for the broad banding reference. I'm going to employ some of those techniques to see if I can get it there. Keeping my fingers crossed......

I got a screaming deal on one over Christmas. Couldn't pass it up. Nice radio but its not going to see much of any "airtime" until somebody figures out how to get the frequencies opened up.....which may be never.

Yes, when I say out of lock both TX and RX do not function. No power output, no green RX light, no red TX light when keyed.

Yes Robb, now I have to get there which in this case is 99℅ or more of the battle! So.....any pointers on how to get there?

Well...?.if it ain't broken I'm not going to continue to fix it! I`ll leave it in there.