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Re: [Amps] SB200 on 30 m

Subject: Re: [Amps] SB200 on 30 m
From: Steve Wright <>
Date: Sat, 7 Oct 2017 10:32:17 +1300
List-post: <>
On 07/10/17 10:07, Michael Clarson wrote:
> [...] Besides the 3 dB, he'd get better match to exciter, better
> harmonic suppression, and,better efficiency which is easier on the
> tubes and power supply. Probably only changing taps on coils and maybe
> a capacitor or two in grid circuit. Easily reversible mods.

That's OCD levels of daft.  No one in their right mind goes through
those hoops for 3dB, and all this better matching and harmonic
suppression is just virtue signalling.  A simple rotatable dipole will
give you your 3dB, AND it works on receive.

This is all assuming the mods DO go smoothly, and the amp still
functions at full output on 80 and 40, which wasn't power to begin with
- the SB200 is only a 600W amp on 80/40/other so why bother?


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