Broadcasters are required to have Log Entries for the transmitter (at least they used to), that shows the plate voltage, plate current, etc. This was used for the Proof-Of-Performance testing and to
Tom, Between the SB-220 amps I have owned and worked on for repair, the number is staggering. I can tell you with certainty that many of the Sb-220's I have seen have had their relays wired 2 differe
Hi, Does anyone know with any certainty the difference between a 3CPX and a 3CX tube? Checking the Eimac data in reference to a 3CPX800A7 vs a 3CX800A7 it shows that a 3CX800A7 and a 3CPX800A7 both c
This was in the "pre Russian tube" era, otherwise one or more GS35's or GU84's probably would have been used. 73/ Karl-Arne SM0AOM I have used the GS-35B a couple of times, the tube is rugged and che
Other than retuning, that is all that I have found. Mike, how far off can it be? Alot? Lou _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contestin
Not only that, it is also too big and heavy for the relatively small power it does, it needs the same space as the 3CX3000A7 73 Peter I have used the GS-35B a couple of times, the tube is rugged and
There is another BIG difference between the two. The GS-35B is no longer being made. When will the supply run dry? The 8877 is still in production and with commercial broadcast use, will probably be
I joined this reflector because I am considering picking up a project Amplifier in the near future. The idea is to teach myself amplifiers. I have only owned one amp in the past, a SB-220 which worke
GL de Mike, W1NR Very good advice Mike. Lou _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
Just ask Lou, W1QJ, how many bad bandswitches he has seen from SB-22os. My experience is 7 out of 10 SB-220's have at least one burnt contact. The amps still may work because the contacts are redunda
Whatever amp you choose, you must train yourself to always TURN THE POWER was replace NOW THAT IS SOME REAL GOOD ADVICE!!!!!!!!!!!!!!!!!!!!!!!!!!!!! _______________________________________________ Am
One of the best commercial amps ever made for the ham market is the original ten tec Titan 425. Separate power supply, compact but powerful, quiet, runs a pair of 3cx800' I have had 3 of these amps i
What modifications did you make to get 1500 watts out, was it just a power Just FYI, A Drake L4 amplifier tank circuit and related parts will handle 2KW OUTPUT. One of our members here has on several
Hi All, I have a couple of Amperex 4-400A tubes, they look like new, but who knows. I could test them in my amp as GG but I am not sure if that would be the proper test if someone wants to run them i
Good Day everyone, I enjoyed the extra hour of sleep this morning!! Today I am offering a BRAND NEW IN THE BOX Amperex 3-400z/8163. Original box and paperwork included! It is a 2001 vintage tube (a r
I think he is looking for the material to make the chimney.... Not to simply glue it together? Jim W7RY Plumbing supply store sells this stuff. NOT HOME DEPOT a real plumbing supply store. 73 Lou ___
Typically this is done on may amps, but be sure to reverse the diode polarity when used this way. It works fine in an SB-220 and I have done it several times. Good Luck Lou __________________________
Hi All, I want to make everyone aware of a wiring error that may be present in some of the following amps AL-82, AL-1500. AL-1200. You can test to see if your amp has this wiring error very easily. Y
I'm surprised more AM operators haven't built modulators to add to things like AL-1200's etc and plate modulate them. Many years ago after I got rid of my plate modulated Viking Ranger and got an FT-
My problem is: when the amp is keyed (no drive) the grid meter slams forward against the peg. Does this with two tubes. Disconnect the filament leads and it does not budge. Check to see if your grid