[ARC5] BC-230 Coil Tap, Etc.

[David Stinson]

The Coil Tap:
The wire soldered to the antenna coil is not a tap;
it is in fact the top of the tuned winding. The extra
turns above this connection provide part of the 
range for matching the antenna. See the attached
photo from the -AO manual.

The VT-25 vs. VT-25A:
Back when I was building the SCR-183 set and 
posting progress reports every day or two, this was
one of the issues. I posted photos and comparisons
at the time but don't know where those photos are 
now. The VT-25s are, in fact, just "re-labelled"
801s and are considerably less robust than the 
VT-25A. The VT-25s output significantly less
power. I could break the set out and do all 
these measurements again, but if anyone was 
really listening at them time and has the posts
I made then about it, you would save me some 
headaches. I have limited bench space.
P.S. If you have hamfests that have reasonably-priced
VT-25s of any kind, count your lucky stars and
buy them ALL.

6C4: I never got the 6C4s going. The 6AQ5s
did the best job and can output as much as 
7-10 Watts. Yes; really. I posted all this 
at the time as well. 

I pulled the 40 meter 355 coil set and the attached 
photo showes the tap settings when using a good 
50 pFd cap in series with a 50-ohm load. 
This gave excellent output and did 
good work during Novice Rig Roundup last year.

More later. Work calls.
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