[Boatanchors] rigs from antique QSL cards

[Ron VE8RT]

Hi Jim,

   thanks for reply, what I see on the 1948 card for the TX
6J5-802-814-PP819s 700W input  receiver SX-28A

   on the 1946 card the edge of the card is missing but I read ?L6-807-?
P-T55s  ?60W part of the other side of the card with the receiver
missing, only SX-

   The newer card doesn't say if it was CW or Phone, the report was 57,
the second does say CW with a report of 579x, was the x to indicator
crystal like stability?

   Sadly they're likely long gone, I was trying to imagine what they
may have looked like, and maybe what publication they would have gotten
the design from.

   73   Ron VE8RT


On Tue, 22 Sep 2020 17:49:01 +0000
JAMES HANLON <knjhanlon at msn.com> wrote:

> Ron,
> 
> I should be able to comment on the rigs from your QSL cards - I was licensed in 1952 and my rig was an HRO-50 and a home-brew 6AG7 tri-tet crystal oscillator driving a brand new 6146 to the 75 watt limit for novices in those days.  Please let me know what the cards say about those two rigs.  And yes, in those days people talked about their transmitters in terms of power input to the final amplifier rather than to RF power output.  Power input could easily be determined by multiplying the DC plate voltage by the DC plate current, both measurable by readily available meters of the era.  Output was harder to measure directly.  There were RF ammeters, usually thermocouple types, but we didn't know what the resistance of the load was that we were working into.  I remember loading my tx into a light bulb and comparing its output to a bulb driven from the 60Hz line voltage through a Variac variable voltage transformer and using a photographic light meter to set both bulbs to the same bril
 liance.  50 ohm loads, SWR meters and power output meters were still a few years away at that point.
> 
> Jim Hanlon, W8KGI


-- 
Ron VE8RT <ve8rt at yknwt.ca>