"Danny Richardson" wrote in message
...


I have not received a reply from Ray at QRO and, no, he has no
documentation for the HF-1250.

Besides the HF-1250 using only one tube there are other differences
between the HF-2500 and HF-1250.

Thanks for the suggestions.

vry 73,
Danny, K6MHE


Possible changes to some components for current and power increase.

One tube designs are not always economical -- when the cost to add an
additional tube and parts changes is small (on a unit cost basis) -- you
already have the case, meters, transformer (possibly a bit higher current
ratings) and relays. IF the specific tube used in the amplifier is
inexpensive -- that is usually the deciding factor.