One correction:
The switch was originally designed by a N8 ... ME ... N8DE, when I
worked for Dentron back in the 70's.
I asked for nor received any compensation for the design, and it has
been in the public domain for all these years.
As for your problem putting 160m energy through the switch to your 40m
antenna, it's due to the FEEDLINE being part of the antenna at that
frequency and the relay contacts have probably been burnt from high
current. Thus, the reason it 'works' when you bypass the remote switch.
73
Don
N8DE
Quoting David Thompson <thompson@mindspring.com>:
> Don't know if the HOFI remote switch is made in Europe any longer but this
> switch was sold in the USA by Electronic Switch in the mid 1990's. As I
> recall its useful to 500Mhz.
>
> I have used a Heath HD-1481 remote 4 position switch for over 25 years.
> Been down twice for maintenance but still going strong. The switch uses
> the coax or hardline to control which antenna is in use. No need for a
> control cable. The switch was designed by a W0 and the HD-1481 is the
> second iteration.
>
> The only problem I have is that if I try to load my 40 meter cushcraft on
> 160 through the switch I get unstable SWR and loading with over 100 watts.
> Running a coax directly to the 40 works OK. I also use the 40 meter beam
> on 17 with no problems running 700 watts output from my old Henry 2K.
>
> If you have a Cushcraft 2 el 40 (either version) listen on 160 and you will
> be surprised. I recall that N4KG thought this was top loading of a tower
> on 160. But it does not work on hy-gain or Telrex.
>
> Dave K4JRB
>
>
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