[1000mp] Interfacing Ameritron AL-80B with Yaesu FT1000 MP Mark V

Sun, 20 Oct 2002 19:46:25 -0000

Rich Measures, AG6K, has a lot of stuff on
SB-220's---http://www.vcnet.com/measures/ should lead you there. And you
could QSK the amp, with somewhat more effort. But, as Pete says, adding a
simple transistor circuit between the relay control and the relay solves the
problem best, and allows you to turn off the MP's relay and use the keying
lead in the Band-Control jack, which is from the transistor that operates
the relay.

Garry, NI6T

> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of Pete Smith
> Sent: Sunday, October 20, 2002 15:31
> To: [email protected]
> Subject: Re: [1000mp] Interfacing Ameritron AL-80B with Yaesu FT1000 MP
> Mark V
>
>
> At 07:11 PM 10/19/02 -0700, you wrote:
> >Now the guys at Burghardt's said that I should use a relay anyway, like
> >Craig WA2TWF suggests.  Is the 100 VAC @ 500mA handling capacity
> that Yaesu
> >claims inadequate, or wrong?  I use my Heath linear with a Drake
> C line, and
> >I've never had any problem.  I guess inquiring minds would like to know.
>
>
> The problem with the SB-220 is that there's no snubbing diode on
> the relay,
> which operates at ~110VDC, so you can get some fairly substantial current
> surges.  I used a 220-ohm series current limiting resistor with
> my TS-930,
> but if you have any concerns at all I'd suggest installing the Harbach
> "soft-key" circuit in your SB-220.  It limits the switched
> voltage to low 2
> digits and a few MA.
>
>
> 73, Pete N4ZR
> Sometimes a tower is just a tower
>
>
>
>
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