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eHam Forums => VHF / UHF => Topic started by: W7EKB on June 28, 2013, 12:54:23 PM



Title: Tokyo HP Labs model HL-110V amplifier
Post by: W7EKB on June 28, 2013, 12:54:23 PM
A friend has contacted me about possibly repairing his Tokyo VHF amp, a model HL-110V. This amp will output 110 watts with eithr 5 watts or 10 watts input.

An owner before he got it had driven it with 55 watts (it needs no more than 10 watts input at most), and essentially destroyed the driver(s) and finals. When my friend attempts to even turn the amp on, the heat sink gets so hot within about 5 minutes that it burnt his hand when he touched it.

He can't fix it himself as he has only one hand.

I found NOS final amp transistors for it for $25.00 each. However, I have found no documentation except a difficult-to-read schematic, but this will have to suffice.

Is this amp worth attempting to repair? He does not want to spend more than $100 on it. I think it will cost at least that in parts alone.

What is the opinion on this forum? Are there other amps available for $100 or so that would NOT have to be repaired? Might someone have a complete manual, preferably a maintenance manual, for the Tokyo HL-110V?

Thanks,

Ken Gordon W7EKB