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So what's the verdict? Any positive change?

I have heard people say yes you can, and I have heard people say you shouldn't because the tantalums are felt to be more "temperature stable" and "accurate". Since this is in the PLL I would personally be inclined to stick with tantalums if at all possible. I would welcome others to chime in...

The one with it's lid blown off, (lower right?) looks to be C850 a 10uF/10v tantalum by the parts list. The other one (more upper left?) looks to be C824 a 0.33uF/35 v tantalum.

My apologies, I grabbed the wrong one initially. Okay yours is the Matsushita M58472P. LD is pin 7... same song. Pin 7 will be high when locked, Low when not. And this radio does kill BOTH RCV and TX when it is not locked.

Just me.... but a "first couple of things" I would check would be: 1- Power. Find and check all the power supply test points just to make sure you aren't fighting something simple that is common to all/many circuits. 2- My SAMS shows this unit uses a PLL02A for the PLL chip. Check pin 6...

I got this one Dan!!!!!!! Doffo, I just saw this... and happened to already have it ready to roll.......

Dan, just to offer you the option, here is the complete section 9.7 Mb total. Just for the convenience! Bob

A wise old work friend many years back once said.... "Sometimes you eat the bear, sometimes the bear eats you!" But still, for those times when you come out on "the lucky side".... THAT is why we do it!!!!!!!!!!

@nomadradio I hope you don't mind me asking a question. Not challenging at all... I'd just like to know your thinking and your experiences! On that Tram Tuneup Doc....... One change interests me...... ON the BA board... C625 it is originally 4 uF 150v. It is in the cathode circuit...

Ooooh! I understand that!!!!

A long time ago I found a Tram D201A on the local Facebook marketplace for stupid low money. Initial tests showed that is works.... "kind of"!!!! But I wound up just setting it to the side to hold it for a better time. I keep looking at it.... and started thinking.... "why not now?". With...

399, Just a simple message of "thanks"!!!!! Somehow I have missed your 858 page on this journey.... and just "took a short tour"!!!!! Thank you so very much for this "treasure trove" of info. So much in there!!!! I have a pair of TRC-458's and saw the section on R/S's "detuning" mods...

Thanks indeed. I just scarfed this into a text file and saved it!

Dan, I just got nosy enough to look....... I think that there is a mistake in the SAMS index.... at least the one that I can see on Lou Franklin's site does...... When I look up Washington... I see the same thing you are saying..... CB-118 says that it is the early version..... The only...

Received it today!!!!! I was working my "day job" so I didn't have a lot of time... but on my lunch break... I ran it through some tests.... PA - works fine. RCV - threw it on the B&K 2040 - receive works fine. It hears QUITE far down (to the bottom attenuator and then roll the knob down...

That one.... I have had for years. Somewhere back around 2017 or so one of my son's friend's dad (may need to draw a map!!!!) who was a CB service tech...... died of a heart attack IN HIS SERVICE van while working on a radio. His wife later called Tim in.... told him... whatever he...

ALSO SUSPICIOUS....... (shows up better in this clip!!!) L11 (path to the final collector) and L13 (path to the driver collector) Make sure those are still good...or DC won't get to the associated collectors.

That WOULD be a good check at this point. As I look at that circuit.... with the +13 going into the transformer on the bottom, the audio IC tying in at the center tap... then the top of the upper winding goes off to D10 and the final/driver... I catch myself thinking that RCV and PA could...

You lucky guy!!!!!!