[Heathkit] sb-230 Antenna Relay

[David Larson]

Hi Bob. I looked in the SB-230 manual and it calls for a 69-55 relay.
I checked my SB-220 manual and it uses the same part number 69-55.
The SB-220 manual says  69-55   $7.75  TPDT 110 VDC relay.
The SB-230 manual just calls it a relay.
On page 110 of the SB-230 manual, it show a pretty good picture of the
relay.  It looks like the center set of contact are not used, nothing is
soldered to them.  So I'd say you should be able to use an SB-220 relay
without any problems.  I can scan page 110 and email it to if you like.
Hope your tube is good. They are way expensive to replace if you can find
one.  When I got mine, it would run a while then blow the .75 amp fuse with
a big bang.  I pulled the plate voltage off the tube by lifting the wire with 
the beads that connect to the plate and let it run with just the heater 
voltage for about 3 or 4 hours.  Hooked the plate back up and then the fuse 
held. Don't know if the tube was a little gassy and liked to flash over but 
it seems to work after the 3 or 4 hours of cooking.
Good luck with the SB-230. They are a nice looking amp.

73 
Dave WB0TSR

On Sunday 08 January 2006 10:04 pm, Robert Dorchuck W6VY wrote:
> Let me try this again and see if I can hit the right keys!!
>
> Does anyone have the specifications on the antenna relay for the
> Heathkit SB-230.  I found the Heath part number 69-55 on a schematic
> on Bama but I can not find any physical description of the relay.
>
> This relay number is the same as the SB-220 but on the SB-230 schematic
> it is shown as a DPDT but the SB-220 relay is a TPDT.  It does appear
> to be a 110 VDC relay.
>
> Can anyone out there with a SB-230 manual check the parts list and
> verify the relay for me.
>
> I am trying to get this info for a friend and have no access to a
> SB-230 to look at and cannot find a manual on the internet.
>
> Any help appreciated.
>
> Thanks,
> Bob  W6VY
>
>
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