[Heathkit] SB-220 Numbers

[jeremy-ca]

With decent tubes and 240V line:

Ep  2500-2600V
Ip   800 ma
Ig   225-250 ma
Po  1000-1200W

This is for key down in the SSB position with 100W drive.

Tune for maximum power out then increase loading (less Load Cap C) until 
power drops 25-50W. This will give you the best IMD.

Carl
KM1H

----- Original Message ----- 
From: "Bob McGraw - K4TAX" <RMcGraw at Blomand.net>
To: <heathkit at mailman.qth.net>
Sent: Tuesday, July 31, 2007 3:46 PM
Subject: [Heathkit] SB-220 Numbers


>A friend has recently acquired a Heath SB-220.  Lacking access to the 
>manual, what the numbers for plate voltage, plate current idle and plate 
>current at full power and grid current.
>
> Thanks
> 73
> Bob, K4TAX
>
>
> ----- Original Message ----- 
> From: "Rick Brashear" <rickbras at airmail.net>
> To: "'Peter Markavage'" <manualman at juno.com>; <heathkit at mailman.qth.net>
> Sent: Tuesday, July 31, 2007 2:24 PM
> Subject: RE: [Heathkit] Amp Keying Interface?
>
>
>> Yeah Pete, but you don't get to hear the KERCHUNK!  That's the part I 
>> like.
>>
>> Rick/K5IAR
>>
>>
>> Yuck! Keying circuit of whatever... keying relay... keying relay - Sounds
>> like a telephone switching office design. Solid-state switching is quick,
>> quiet, and reliable.
>>
>> Pete, wa2cwa
>>
>> On Tue, 31 Jul 2007 14:35:56 -0400 john <johnmb at nc.rr.com> writes:
>>> Yep! Might be nice to put a diode across the coil to clamp the coil
>>> when
>>> the 12V is removed.
>>>
>>> John K5MO
>>>
>>>
>>> At 02:05 PM 7/31/2007, Bob McGraw - K4TAX wrote:
>>> >Be advised that Harbach Electronics is closed due to health reasons
>>> and
>>> >not accepting orders at this time.
>>> >
>>> >A simple keying interface is a 12VDC coil relay with N.O. contacts
>>>
>>> >available from Radio Shack.  Enclose same in a small "project box"
>>> with a
>>> >couple of connectors of your choice.  The 12V is from the FT-847
>>> and the
>>> >normal keying ckt and the N.O. contacts go to the SB-200.  The
>>> project
>>> >should cost about $6.00 for all the parts and then have the fun of
>>>
>>> >building something that works.
>>> >
>>> >73
>>> >Bob, K4TAX
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>> ** For Assistance: dfischer at usol.com **
>> $$ See the vintage area on the HCI web site - http://www.w9wze.org $$
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>
>
> _______________________________________________
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