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I have a Palomar Elite 600 to work on. told it keys up, but no RF out. I downloaded the attached schematic and took a quick glance at it, and noticed a bias circuit. a "quick glance" I thought, "cool! this amp is worth working on!" so keyed up the amplifier with a resistor to ground at the...

the radio is not turned on! the filament on that big tube is not lit up. oh, it's comedy. there is more to this scene. (click here) Herman Munster on Ham Radio

here is a tip on troubleshooting modulation problems in these radios. there is a built-in audio generator. the "roger beep" strong roger beep audio is fed in before that mentioned double op-amp. usually on these radios, the AMC and ALC is turned off, and/or the components cut out. You hear...

there are some scenes in them cool old TV shows. someone can chime in here if they remember. maybe Outer Limits, Twilight Zone, The Munsters, Adams Family, etc.. saying they are using "Ham Radio" but I always noticed the "this is not Morse Code" used. back when that movie Independence Day...

. yesterday I repaired a Uniden board (Madison/Cobra 2k) had no signal from the carrier oscillator circuit. the crystal had a glob of "that glue" on the side of it, and it all fell off the board when I touched it. I had a RCI/Galaxy radio recently with the same problem, at the carrier...

I know some guys that follow this advice. this Rust oleum paint, from this hexbeam website (click here) paint my hexbeam

in case you don't have them HR2510 modifications. hopefully you just notice bad soldering as I have. That happened to me on some other radios, after the "MARS MOD" has been done to them.

"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...