Search results

I’m a newbie when it comes to ceramic tubes. The 4cx300 variety is what I’m trying to use. I was fortunate to get several used 4cx300y tubes from a generous Ham out West for little more than shipping (callsign added later when I dig it out) and I purchased some NOS tubes from eBay: Some...

Thank you, I've been running the Fils for several hours. Had to rewire blower and chassis fans so I could adjust speed, noisy amp for sure. A few hours to go then I'm back to RF testing

I got the volts & currents squared away. About to install two “new” 4cx300a I got from 2 different eBay Sellers. I used an old pair of 300y's to do rough tuning. Filament V tweaking (6v) had me learn the Buck-Boost wiring of the AL-572 transformer, it provides more V options than I expected...

I setup my father’s hustler multi-band antenna with trunk mount. That’s a heavy antenna for window mount? The thick tube with quick-disconnect fitting on bottom and a plate on top for several band-dedicated tips with loading coils. You need a good metal surface for ground plane effect...

Tetrode Progress slow. I had to stop today after a test lead/clip came off and sparked blowing 2 glass Resistors on the AC input of my HVPS board. Nomad, if you're reading this, what are the values for replacements? Glass I think. The remnants are unreadable. I re-wired buck-boost for more...

alright 27.155 I give it a listen & shout from NYC; 90 minutes later: Several locals on here in NYC

Really old thread here but I've been trying to rotate on ocassion, certainly not daily. I have a vertical pipe to start with. Placed sally clamp at top and another a few feet down. Clamps can be loose around mast so it will spin free inside sally clamps. 2 sets of holes with a thin bolt...

This thread was a nice read.

Alright now it's fixed. Thanks!!!!!!!!!! That been bugging me for far too long.

I have the EF Johnson Low Pass filter from decades ago. It is the model with adjustable air caps at each end of a cylindrical aluminum tube. I spent some time setting it up yesterday. I drove it with an FT-891 at 6w connected with two, 12" lengths of RG-8x patch cords into a dry DL. I could...

Thank you I was puzzled at first because I kept presuming my hand hit the Freq knob. I'll run that down today and update later. A little thing like that destroys confidence in equipment & changes operating experience. Thanks for sharing that.

Hello All, 10 Meters been open for long distance lately. Made a few jumps over the ocean on 28.420-.450 I’m trying to set filament voltage on my homebrew project. 6vac but I’d like to be more accurate than 10% or half a volt. I have an RCA Voltohmyst Junior I renovated (manual says it’s...