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Hmmm, I just noticed something.... D93 and D91 are missing. If I'm not mistaken, D93 ties in with FM deviation somehow and the emitter of the Passthrough according to the 99v block diagram. D91 ties into TR49 (modulation transistor) according to the 99v block diagram. Going off the 99v...

Yanked out all diodes in that circuit and tested out of circuit. I started with D68 because it was showing 4.56v on the banded end in receive and 0.034v in transmit, so I figured it was bad. Nope, tested out fine, as did D67, D69 and every other diode in that circuit. I even checked the FM...

Working on it and cooking supper now. Post back later with results.

Gonna replace that TR32, then I'm gonna check voltages in receive and transmit on all the ICs and transistors that could affect the audio. I'll post voltage numbers in a bit.

As another thread on this site stated in which the same kind of radio was exhibiting the same issue, I removed TR32 and checked FM audio (it actually came up some enough to use). Both SSB sound great without garbling or warbling and the modulation sensitivity improved dramatically on both SSB. I...

I wonder if C108 or C90 being 220uf instead of the stock 100uf would have anything to do with my issues on this radio.... I had no more new 100uf left to replace these two, I figured it wouldn't hurt to use 220uf instead, but maybe that's the issue. C90 is between the PLL and FM deviation...

C128 or C129? Reason I ask is C128 is a .22uf 35v tantalum capacitor. Whereas C129 is a 1uf 50v electrolytic capacitor. I replaced C129 with a new 1uf 50v when I recapped it the other day. I checked C128, it checked out fine but I replaced it with a new one anyway. I do hear a slight more...

Checked voltages on the mic amp (4558) in both receive and transmit, it shows about what it should be. Checked TR32 in both receive and transmit, it shows exactly what it should show. Checked FM deviation adjustment VR, value is very close to what it should be and adjusts smoothly. Guess...

Yes, the two guys that checked it out on the air for me both were on FM with me. Plus after they told me the modulation (deviation) was low on FM then I turned up my Yeasu FT-950 on FM mode and listened, sure enough the modulation on FM is almost non existent even if I crack mic gain wide open...

Got a Galaxy Saturn base on the desk (still waiting on cap order to finish up Osaka). Issue: FM audio (modulation) is low to almost non existent on both PEP and average. I know FM isn't supposed to swing, I should have said my locals can barely hear me on FM at all, they say I have a great FM...

That's how I always tell them to set the mic gain. I tell them to do it with their meter in avg or rms mode. Once you get it set at the right spot then the avg/RMS swing will start to drop back if you go too much on mic gain. Example: 1. Place meter in avg/RMS mode. 2. Place radio in AM mode...

I need you guys in my area to explain it better to a few locals around here, we've tried, lol... This past weekend (Friday night) we had one of those "Fear the mic gain" guys on channel 40. He sounded muffled, yelling in the mic, yuk.... I got tired of hearing everyone else telling him to turn...

Yes, as the title states, there is a fear of turning down that Mic Gain. For some it's as though they think it will bite them or something. What I'm getting at is, in my local area many operators have learned how to adjust their mic gain and power mics to sound great. But then there are those...

Bad news!!! This practically brand new radio never had a chance when it left the original owners hands. I was helping this local get it back together the past few weeks. He does great solder work, listens very well and has fixed several radios of his own, sometimes with my help and sometimes...

I've already replaced all the limiters and rest the bias, checked the vco voltage and buffer along with oscillators. Results before recap: Receive noisy, too much hash. Transmit and receive sensitivity is low. Transmit swing is around 43w PEP, 20w peak at 14w average. Dried up AMC cap and audio...

I'll up a pic of the outside and inside in the morning when I get back to work.

Well, starting on this Japanese version of the Galaxy DX -88HL. It's called Osaka by Japan and looks identical to the 88HL. Evaluation: 1. All the caps look dried up with goo at the bottoms or seeping out the tops badly. 2. All controls and switches scratchy, needs cleaner. 3. Meter stuck...

I may have another export SSB parts radio laying around here I could throw in it. Thank you Nomad and Cable.

After sitting for a while, I realigned the entire radio. Results: Receive is awesome, all modes. Transmit is awesome, all modes. Transmit and receive sensitivity is great in all modes. USB now has the trebly sound whereas LSB sounds like it should. All features work as they should, with the...

Question though: For the two 100uf caps in the vco/oscillator section, I had no more 100uf in stock so I used 220uf instead, will this cause issues?