Excuse my bad typing. I meant to say to se sure they are NOT Bristol wrenches which were ny Hallicrafteres as well as Collins and still used in military and aviation applications. Glad to know yours
3-500z Eimac Data Sheet says Typical Operation 890 watts useful power output CW or PEP with 3500 volts on the plate. Maximum plate voltage 4000 volts. Henry ran them at 4000 on the 3KA. I had one wit
Eimac 3-500Z data sheet says for typical operation 890 watts useful power output CW or PEP with 3500 volts on plate for one tube. Maximum plate voltage 4000 volts. Some Henry amps ran them at 4000 vo
Karl-Arne is correct. Check the schematic not the manual text. Dave W7VM _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/list
Bothethe DX-100 and the DX-100B came from Heathkit with cathode keying. Heathkit did release a kit to change to grid block keying and it was available (same kit) for both transmitters. In the instruc
You would have to look at where the contacts were made and what multipliers. S units were never standardized and are worthless. There is something really wrong with your amp or your antenna system. H
Nothing to do with original Western Electric. However, the new Western Electric tubes are or will be made in the US. I forget the owner's name but there was a discussion about this on the Antique Rad
Read the reviews. All say 300 watts output. Looks like an error in the manual. 50 amp fuse seems reasonable. _______________________________________________ Amps mailing list Amps@contesting.com http
What does the schematic, not the manual text show? _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
So, just curious, with no transceiver connected and with the antenna relay activated by grounding the connector center pin, does the amplifier show normal idling current? Or was there obvious damage
Are you sure they are not Bristol spline screws? A hex (Allan) wrench of a close size will turn loosely in a Bristol socket. Collins, Hallicrafters and many industrial devices used Bristol screws. Th
One common suggestion is to run them first on the lower voltage CW setting but leave the key down long enough to get the anodized nice and red. Do this for several times and then use them normally in
The original poster said they were in original Drake packaging. If they were in fact in original sealed Drake boxes I wouldn't worry about using them together as Drake would have sold them at differe
I have Jim's board in my SB-220, it works great! _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
If the cap is bad Henry Radio still sells the resonating cap at their on-line eBay store for $129. The description says it is of current manufacturer and is .1 mfd at 8000 volts. The original is .1 m
Be aware, only the later (date unknown) Henry amps had the crappy chokes made by a start up in LA. Older ones such as my 2K-3 had Triad chokes and transformers. My 3ka had the crappy choke and it did
The step start gizmo is a chicken brooder heater, still available in rural supply stores. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting
Most modern transceivers have a menu setting that will delay the first letter transmission for a milliseconds after the amp has been switched to transmit. If the amplifiers have mechanical relays thi