The Frankenradio (FR-13) is completed
with acknowledgements to
I will not go into the rest of the story but every stage from the power supply to the AF amp presented me with a challenge. Often it seemed I went two steps forward and one step back. The calculation and wiring of the 160 coils seem like they should be rather simple as I had the other coils to model them on. After numerous attempts and much frustration because I kept ending up around 7-11 megs and tuning that tracked backwards. I went into some old books and found that although other coils were tapped midway, for band spread purposes, the 160 coils are not. Got rid of the tap and away she went. I added a nice octal tube 100 KCS calibrator from last months ER. So the final tube count is 13, hence FR-13. The brand name Frankenradio, represents its evolution.
The audio is really nice and it came with a 6
KC Collins filter which works well for 75 and 160. The dial and osc tracking do not match
so I intend to make up tuning charts for 160, 80 and 40 and place them in the open area to
the right of the dial
So she works well on 160 and 80 but a bit weak on 40. (I am pretty sure I know the problem there). I have not tried it on higher bands since they are not my primary interest.
So thanks to all involved and I look forward
to hearing you on the Frankenradio. Now to finish collecting the parts for the 813 rig to
go along with it
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COPYRIGHT 2005 Carl Nord Last updated 04/25/05