[Boatanchors] Grounded Grid filament choke spec's

[Kenneth D. Grimm, K4XL]

Hi Greg,

Although you have received a couple of responses saying that the FC 30 
will be OK for 160 mx, I feel that I should point out that B&W rate the 
FC 30 for 3.5 - 30 MHz.  Also, I have heard others say that the FX 30 
won't work on 160.  Whether their comments were based on trial and error 
or on simply accepting the manufacturer's ratings as gospel, I can't say.

73,

Ken - K4XL

Greg Mijal wrote:
> Hi:
> A couple of months ago the group discussed using filament chokes in grounded grid amplifiers.  Someone mentioned that if you were planning to use the amp on 160m a larger filament choke was required.
> So what's up with that? What's the magic number of uh's needed to decouple a 160m driving signal?
> I measured a B&W FC 30 filament choke and it measured in the 7 - 10 uh range for each wire. Am I ok using the FC 30 as is on 160m?
> Tnx
> Greg
> WA7LYO
> Kinston NC
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-- 
Ken K4XL
k4xl at arrl.net

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