Dr; I have from the scrap and in repair a old Kenwood TL922 amplifier. I will do some demonstration and technical test for a school educational = object in electronics. But I only have obtained one o
Pair of 3-500z output - well lets say 1000W into 50Ohm. with only one 3-500 its 1/2 ... so you have 500W into 50Ohm The impeadence of the plate at 500W is basically double that of 1000W. In turn chan
Hello Jean: I see the problem as follows: You got an amp that uses two 3-500 tubes, but you only got one 3-500 tube. An additional 3-500 tube would cost more than the amplifier and you want a cheap s
A. A new 3-500Z costs around $150 B. The grids are not grounded in a TL-922. C. I dont think there is top clearance for a 4-400 Carl KM1H _______________________________________________ Amps mailing
"A. A new 3-500Z costs around $150 B. The grids are not grounded in a TL-922. C. I dont think there is top clearance for a 4-400" The ham raising the question was not in the US and tubes may be more
Belgium is not a 3rd world pit! Distributors are in Europe or one could be shipped from the USA for about $15. As long as it is realized; its not a direct swap otherwise. About .3" taller than the cu
It is not a question of money or to put some other types of tubes. It is a question of using only one 3-500Z in this amplifier and what I have to change to realise this not more ! Of course I have to
It is not a question of money or to put some other types of tubes. It is a question of using only one 3-500Z in this amplifier and what I have to change to realise this not more ! Of course I have to
Hello Jean: I do not have a TL-922 and have only briefly looked at the schematic, so these are just my thoughts to consider. 1. The filament transformer in the 922 is a combination unit that also pro
Understood now. One problem that needs to be resolved is the input network. I dont believe there is sufficient tuning range for the driving impedance of one tube. Why do you want to run only one tube
/*snip*/ You do NOT have to change the transformer! You could replace the missing "tube filament" with a resistor, a good calculation and example of Ohms law. -- Ron KA4INM - I'm proud to be Chuck's
Download the manuals of the AL80B and the AL82 from the Ameritron site and compare the input and output circuit values and/or part numbers. There may be some clues there. Apart from that, it seems to