[Boatanchors] Re: GB> CATHODE MODULATOR - ARRL 1954 6SL7 6Y6

[Garey Barrell]

Greg -

I built one in 1957 to use with my Globe Chief 90.  I used a Stancor 
C1001, which was 10 Hy at 110 mA I think.    The "idling" current was 
way below that, and I used it for about 6 months with no problems.  Used 
it to talk with the 75M mobiles in the afternoon after school, (the 
"two-meter" band of the 50's,) and they were all very complementary 
about my audio.  They were all using BC-696's and Multi-Elmac 67's.

73, Garey - K4OAH
Atlanta

Drake 2-B, 4-B & C-Line Service CDs
<www.k4oah.com>



Greg Mijal wrote:
> Hi:
> I built the Cathode Modulator listed in the TIS pages at the ARRL 
> website as the Simple Modulator.
> It's from a 1954 article and uses a 6Y6 and a fixed inductor in the 
> output.
> I'm wondering what value of inductor is needed to modulate a 75 W 
> input rig.  The article does not list a value only "small ac/dc 
> inductor" but it seems to be an open frame type.
> I built one of these as a kid and it worked with my DX 20.
> Can't remember what I used way back when.
> Thanks
> Greg
> WA7LYO
> in sunny Feenix