measures wrote:
> Don't use a relay. A npn transistor does a faster switch than a relay.
> See Figure 7 on my Web site. See article on TS-440 circuit improvements.
>
I don't see the need for a a modification to the FT-1000D circuit board, when a
simple re-flowing of solder joints and/or cleaning of the relay switch contacts
will
cure the problem. The relay in the FT-1000 is quite fast enough for the alpha
87,
and I have never had a problem with hot switching in 5 years that could be
traced to
the relay itself. The problem was always (three times) a high resistance or
open
circuit in the path between the relay and the amplifier.
Bert, VE3QAA
>
> - Rich..., 805.386.3734, www.vcnet.com/measures.
> end
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