Does anyone know of a Heathkit group on the internet? I have a friend with some old audio gear wanting info. Thanks, Jim. _______________________________________________ Amps mailing list Amps@contes
Does anyone have a Triad F-28u Filament trans they might want to get rid of? Thanks and everyone have a great new year. Jim. _______________________________________________ Amps mailing list Amps@con
Most ops here in the good ol USA don`t have a problem with house lights diming when powering up our amps....We usually run the psu from a dedicated 240vac line....At least that`s my way here in Centr
And FedEx just destroyed a GS-35b I shipped to a guy in Texas...I had it double boxed with four inches packing between boxes. And to think I used to bitch about UPS playing football with packages the
Plate voltage has large influence on idle current...gi7b with 2kv/pl works good with 48v/50watt zener diode,assuming proper grounded grid design...Nearly every Russian tube (Triode) Iv`e played with
I have seen reports of such amplifier misconception / Construction causing sunburn to exposed parts of the operator..(1970`s)..Not to mention I have always been taught to never look at an energized t
4-4.5 with the Henry PS? I would be interested to see how he balances the tubes (Bias) I haven`t seen two GS-35b tubes with the same idle current with a given value of bias voltage. 73 all...Jim K7RD
And they (Chinese 3-500z`s) seem to have somewhat higher mu than Eimac 3-500z. If you have equipment that shows signs of instibility with Eimac valves (So called "Parasitics") Chinese tubes will prob
If this method to restore emission is to work, how do you keep the filament from burning up and the acetylene gas from igniting while in a non-vacuum filament on time? What`s the rest of the story Mr
Does anyone happen to have specs for a Kenyon type 502487 filter reactor? Weighs close to 40lbs and has dc resistance of 38 ohms. Thanks in advance for any replys. Jim. ______________________________
When I was in High School, our local fire dept had a "Hot Seat" It consisted of an wooden chair with two nails protruding just enough so the hapless person couldn`t see them but still make good conta
Great idea (Been used by many) but much of the noise generated cooling tubes/tank circuits/transformers is wind noise....Perhaps an exit for heated air would solve this problem for some of the commer
It`s my common practice to have a 50k (Or so) resistor in the negative lead shorted by a relay during transmit...I find this to be less tramatic to tube stability in my amps as opposed to totaly open
Snipers are the scourge of Ebay...I sold an item to one such person, and after he won my auction and requested shipping charges he also informed me he had won the auction with a sniping program and w
Hot water PVC works perfect with the GS-35b(At hf) and shows no sign of melting even at full output for an extended period of time. Four inch fits the tube cooler and I have used this type chimney in
Vic is absolutely correct about resistors changing value due to heat/age/mistuning,etc. Another way to tame especially squirrly amps is to add a supressor to the cathode side in addition to the usual
OK...Strange a fellow would order your kit if he couldn`t solder the "Thing" in place.Jim. -- Original Message -- From: "R.Measures" <r@somis.org> To: "K7RDX" <k7rdx@earthlink.net> Cc: "Amps reflecto
Bob...K8CU has a complete photo/roadmap for a very nice hipot tester as well as tips for super looking amp construction on his website...Check: www.realhamradio.com. Jim,K7RDX -- Original Message --
Where you screwed up is not watching the auction and bidding to win......Sure went for a lot less than the 45.00 you wanted to spend and I`m sure you probably could have had the guys goat in the end.