Hi Tim,

I use 1N4007's or 1N4004's as a drive control in 3 homebrew
transceivers but never for switching. I have used PIN diodes for the
same application I am considering the SSR for. I looked at the the
MosFET SSR's because I have usedIRF510's and IRF740B's to cathode key
my tube transmitters. I was expecting that a MosFet relay would likely
work in a similar manner to switch xtal converters for bandswitching. I
chose the IRF740B for keying my TX due to the VDS of 400 but most due
to low RDS 1 ohm. The low price SSR have avg of 22 ohms but with low
current that may not be a big minus. For a $1 to $3 investment each its
worth an experiment.

Some are specified for RF up to Ghz but most SSR's for sensing and
power control. And they are pricey.

I am really just looking for something different to switch convertors
for 20 and 15 M on homebrew tube rx. I didn't comment correctly above
in my reply. After I read it again he was looking for a way to tune a
band pass filter and i am trying to switch a complete circuit. But I
did look at the varactors too but that was when I considered premixing
for the LO and tuning the front end. Gotta admit I have been building
with tubes a long time.
I just didn't want to use plug in coils.

I looked at your web site and I know Worsester, MA. I was born in
Newton and my dad went to MIT.

Don