[Heathkit] Heathkit Digest, Vol 216, Issue 2 //SB-200 /accessory for sale

[manualman at juno.com]

The SB-200 always came with an RCA-type connector on the input. It never
came with "banana" type connectors.

Page 40 of the SB-200 manual details the construction of a 4 foot length
RG-58A/U coax for connection between the exciter/transceiver to the input
of the SB-200. RG-58A/U is 50 ohm cable. The amplifier was never
speciallly designed for just 75 ohm impedance on the input or output side
of the amplifier.

And, yes, many RCA input connectors on the SB-200 were replaced by their
owners with BNC or SO-239 connectors.

Pete, wa2cwa


On Fri, 4 Nov 2022 17:28:12 +0000 d b <hkdbpo at live.com> writes:
> Back in the day, the SB-200 came with RCA/Banana input connectors. I 
> have an SB200 original condition
> with those connectors.
> I have seen several out of box over the years that came with these 
> banana connectors in the kit.
> 
> Others that were converted to either BNC or SO-239.
> 
> 
> The output is SO-239 chassis mount. Original. So, from the Heathkit 
> Transceiver to the amp, 72-75 ohm
> impedance.
> 
> Is that a clue to the impedance range of the swr bridge?
> 
> Years ago, I asked one of the regulars here
> why the build manual called for , I believe, 72 ohm  cable(could 
> have been 75 ohm) for the RF
> connections.
> His reply was that is what Heathkit designed the SB-200 to use,in a 
> specific length.
> 
> More confusion.??
> WB7TNE