[AMRadio] SB-200 on AM

Peter Markavage manualman at juno.com
Tue Jun 10 14:40:59 EDT 2008

I've used a SB-200 on AM for years. Driven it with a Central Electronics
100V, 200V, Lafayette HA-410, Johnson Ranger, Heath SB-10, Kenwood 599
Twins, Icom IC-706MK IIG, Icom IC-7000, and Icom IC-756 PRO II all on AM.
Still using the same 572B's that were put in it back in 1969. Have a
scope hung on the output of the SB-200 to monitor the transmit signal.

Pete, wa2cwa
On Tue, 10 Jun 2008 14:26:44 -0400 (EDT) John Lawson <jpl15 at panix.com>
>    I have found (and hauled home) a slightly-ailing SB-200 amp that 
> I would 
> like to use on AM...  I'll be driving it with an Alinco DX-70 (40W 
> AM/CW), 
> into an ATR-15 tuner, thence by ladder-line out to my "Sort-Of-NVIS 
> Loop", 
> the which system right now tunes 75 Fone down to 1.1:1 very stably 
> and 
> reliably.
>    Aside from the many pages of mods and tweaks, does anyone have 
> any 
> comments/experiences - good-bad-ugly - ?
>    My previous AM rig was a Valiant - I've not had a separate 
> amplifier 
> since I sold off all my S-Line gear back in the late 80s.
>     Thanks in advance for any info or thoughts on the SB-200 in AM 
> service.
> Cheers
> John KB6SCO
> Carson City, NV
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