Restoring my Transworld T-1000 Amplifier

[tworld1000]

Hello, I am new to this forum. I am working on a project that I wish to complete. I am restoring a T-1000 that came to me with a broken 40VDC 40A power supply inside the chassis. The power transformer is blown. I have found a transformer very close to the original except the look that is quite different.

This amp looks like a surplus of a US military (air force) equipment. The front panel is in darker blue color than the usual light blue or black color that I have seen before. The strange part of it is it has a gang of output filters of 4 bands, rather than the 6 bands for amateur radios. The panel marks channel A, B, C and D.

Does anyone know what channel A, B, C and D are? By looking at the filters they seem to be 4 HF bands spreading between 2 - 30 MHz of the amplifier's bandwidth. The filter assembly actually has room for 6 bands. Only 4 are used (for the A, B, C, D channels). The remaining two are empty. My project will be to convert the 4 filters into 6 amateur bands. I hope I don't have to do anything with the channel A, B, C, D but to add two more to cover all amateur bands. I can build a separate filter box with a tunable filter in it. Just couple this external filter to the amp and set the amp to bypass the internal filters.

BTW, for those who do not already know the T-1000 amp it is a 1KW solid state HF linear power amp made by Trans World Electronics in California. It contains a built-in power supply, 4 power amp modules at 250 watt each and a filter gang of 6 channels at the output. There are 4 pairs of RF power transistors used by the amp. They are Motorola PT9790/MRF-428.

[K7KBN]

I don't know if the T-1000 is anything like the TW-1000, but I found this, which might be of some help.

http://www.scribd.com/doc/26226087/T...plifier-Manual