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"seem to be untouched" I know that you know better and have experience repairing radios from your posts. I have 2 of these 2510's that were given to me years ago, due to problems there. the bands. if was because of the modification to make them go on U.S.A. CB ch 1-40 and beyond. I found...

I have a Pomona Electronics 6265 probe here that I use. it says right on it, 60 MHZ 300V click here: Pomona O-scope Probes my BK probes are PR-45. not made anymore.

I connect the 10x oscilloscope probe at RF output, or inside the radio at the RF output at the coax connector. an easy place, if the covers are off of the radio. I usually was using Tektronix, or B and K, 100 MHz scopes, with their good probes. on a 100W radio, into a 50 ohm dummy load, adjust...

I was going to make my own power strip set-up, at my bench, on the wall, by just mounting about three metal electrical boxes on the wall, so I don't have to keep moving cords around on my 6-outlet metal power strip. But while at ACE Hardware last year, I saw this nice power strip. 27 inches long...

oh, Klondike Mike has the thread I was looking for posted, but hard to know to click on it. https://forums.qrz.com/index.php?threads/power-strip-w-surge-protection-danger.930032/

they have whole house protectors, installed at the breaker box. Astron power supplies have a MOV installed in them, after the 120 VAC line fuse. mounted right at the transformer. when I was working in the marine electronics industry, and using Astron power supplies for the VHF radio...

. I was thinking about that qrz.com guy also when I read this post. here is his post. https://forums.qrz.com/index.php?threads/entire-shack-shop-man-cave-lost-to-fire-tonight.731273/

OK, cool! cool beans! after I get one of them working, I adjust for 10 watts carrier and you get the full 40W PEP with modulation. and for SSB, the same 40W PEP output.

if those MV1Y diodes start conducting at a higher voltage, above .7V, or go open, then you may have trouble adjusting the bias current down, and the base current may be so high that the transistor blows out. you could put some 1N4148's in place of them MV1Y's. just solder them under the board...

here is the post. from just several months ago. But I have changed the bias circuit on several of these types of radios. https://www.worldwidedx.com/threads/old-galaxy-saturn-rf-output-bias-circuit-change-trash-them-mv1y-diodes.269626/#post-854721

if the bias is way high, just the diodes D112/088 could be conducting at a lower voltage. I pull all that stuff off. and remake the bias circuit like this diagram. I also changed an old "orange face" 2950 to have a circuit like this, and I glued some 1k pots on the bottom of the board...

I know this one... was just working on a Saturn...... them diodes the problem.. I posted before....

I have this can from Ruby chemical stuff. no reason. this can has been around my bench for years, and years. it is thick and sticky, it works. clean with rubbing alcohol, or Windex. but what about the solder? use 60/40 or 63/37 tin/lead it melts at a lower temperature, and flows...

no telling how your amp is different than that schematic, and the amp here in town that I worked on. (I never want to work on it again!) but off of the negative side of the HV capacitor board, a 10 ohm 10W going to ground. It acts as a little "cushion" when powering up, and also can blow as a...

I worked on one of these monsters. it is still going strong, down the road from me. 1. - the RF key-up circuit was bad. 2. - the design, or the wiring around the driver tube needed corrections. and yes, no HV to the tubes. a few times. if the breaker trips, from the tubes, or an arc...

yes, I quit a part-time job at that Tractor Supply place a few weeks ago. I loaned some money to a "Team Leader" there, and found out he is into the pills. he said his electricity was being cut off, and also being evicted. all the lies. calling me up at 3 in the morning, all high, for...

I was just using a DX 250 here that had troubles, after the transistors were changed to HG C2290s. Oscillation troubles after un-keying. found problem in the feedback circuit at resistors R9 / R6. They put too high a value in. but the RF input resistor attenuation networks change, in AM, SSB...

sounds like problems in the PLL. not working, not locking up on frequency. that PLL is big, with discrete components,

PLL problems! fun! fun! drinking a few Guinness' here and downloaded this schematic. I watched the video. I noticed TP2 voltage never goes up much over 3.2V it should lock up at times to over 5 volts while messing with L17, to pull the VCO freq up higher. it is best viewed with an...

I have messed with these sometimes very noisy, and sometimes distorted in SSB, receivers. I have read the complaints of "white noise" check the AM USB LSB OSC frequencies. in SSB receive, after the 10.695 filter the signal goes through more amplifier circuitry with tuned input and output...