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This is something very
rare, in fact I am quite confident that nothing similar exists.
Built into the case of a standard
wartime vintage HRO is an SSB transceiver for the 20, 40 and
80 meter amateur bands. |
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It was constructed by the late
G3AQY around 1960 and used by G3SGL (his daughter and now my
XYL) to communicate from her flat in Liverpool to her home in
North Thoresby, Lincolnshire whilst at College in Liverpool studying
for her BA.
The rig connected to an external
linear amplifier using an 811 power amplifier and was used with
a long wire over the roof of her flat on the fourth floor of
a house, which still stands at the end of Princes Road, not more
than a stones throw from the old Rialto cinema where the Toxteth
riots began...
Was this connected with TVI
I wonder?
The rig fairly bristles with
valves. At the last count I found 20 mounted at all angles and
in every inch of the chassis. Mostly they are B9A and B7G but
I found some octal types as well.
If you look closely you'll see
some original HRO parts. The dial and tuning condenser, several
knobs, the S-meter, 7MHz coil pack and one of the original metal
valves. Maybe there's an original IF can with its coil and many
sundry bits still there also? |
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Now for the valves hidden away. These
two are under the chassis adjacent to the tuning gang. |
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Another two, this time under the
PA compartment. |
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And this one is mounted sideways
on the PA compartment screen. I re-counted and found a total
of 20 valves, all bar a regulator and a 12SH7 are either B9A
or B7G. The PA appears to be three 5763 beam tetrodes rated at
around 8 watts RMS output each. |
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Here's the matching power
supply fitted with a long power lead so it can be located away
from prying fingers. I guess the meter deflection will be a lot
greater than 10mA because the three 5763s alone will draw more
than 120mA? |
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to be continued... |
