Hi Martin,
Your rugged 30 year old HENRY 2K-3 could benefit from a relay upgrade by
using either:
RJ-1 or HC-1 vacuum relay which will need 26 VDC to switch and one of our
current guardian relays (to switch input and bias) which is a short throw
DPDT (<10ms switch time) which needs 12 VDC.
OR two Guardian relays jumpering the DPDT contacts on the output relay used
as an SPDT. The two guardian method is used in the 3K Classic X MKII. The
Vacuum (RJ-6) and guardian are used in the 3K Premier as examples.
Before the anti-HENRY types poo-poo this idea, forget it.
This has been working successfully in current production amps for 13 years.
73, Dan Magro W7RF, (President WARC 1999, member SCDXC, SCCC)
Manufacturers Rep & Distributor for HENRY RF Power Amplifiers.
www.radiodan.com <http://www.radiodan.com> ??? RFpower@radiodan.com
<mailto:RFpower@radiodan.com> A trip to our web site is worth the click!
> -----Original Message-----
> From: owner-amps@contesting.com [mailto:owner-amps@contesting.com]On
> Behalf Of Martin Gary
> Sent: Sunday, July 04, 1999 10:10 AM
> To: Amplifier Reflector
> Subject: Re: [AMPS] RJ-1 relay
>
>
>
> I looked at a couple of web sites selling those RJ-1 relays and couldn't
> find a good explanation of how they work. How many contacts do
> they have? I
> want to replace the open frame relay in my old Henry 2k-3. It is HUGE. The
> area were there is no shielding is about 3 inches long. This has little
> affect on the lower bands, but the higher bands seem to be
> affected. I have
> a 2:1 swr on 10 meters with the amp off into a dummy load. After looking
> carefully at the relay contacts (and cleaning them) I think that
> the length
> of the relay contacts is the culprit. It probably causes a loss of
> efficiency there also. Anyway, the question is: Do I need two relays, one
> for input and one for output or does the RJ-1 have enough
> contacts to handle
> both. If I need two is it ok to use a small open frame relay on the input
> and the vacuum relay on the output?
>
> I have two NCL-2000's that I would like to "modernize" also. Any advice
> would be greatly appreciated.
>
> Martin - N3HRT
>
>
>
> > When I was QSKing my Drake L-7, I measured the closure time of several
> >RJ-1's I had on hand. Although the relays were rated at 8ms closure
> >time, all of mine actuated in abt 2ms with 24 volts on the coil.
> >
> > I tried full break-in but didn't like all the noise popping in between
> >code characters. I set the VOX delay to where it stays on between dots
> >but opens between words. Virtually as good as full break-in and saves
> >a lot of wear and tear on the relays!
> >
> >73, Roger
> >
> >--
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> >
>
>
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>
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