Be careful... the SB-200/201 and the SB-220/221 don't have the same keying circuits.
Still, you may be OK. If the TR-7 doesn't use a puny little pipsqueak reed relay or transistor switch, you're probably OK. When in doubt... measure. regards, Mahlon - K4OQ > > From: [EMAIL PROTECTED] > Date: 2004/04/09 Fri AM 10:59:39 EDT > To: john <[EMAIL PROTECTED]> > CC: [EMAIL PROTECTED] > Subject: Re: [drakelist] TR7 and SB200 > > Hi John - > > The TR7 can handle the SB220/221 switching with no external relay/soft-key > needed. > > I have been using this combination for years with no problem. > > Many of the newer rigs have rather flimsy relays and require a modification > to the amplifier or installation of a "soft-key" to handle the current > required to switch the SB220/221...NOT the TR7. > > 73, > Jay/AF2C > > > At 10:40 AM 4/9/04 -0400, you wrote: > >Is anyone using this combination? > > > >I wonder if it's advisable to use an external relay to control > >the amp, or whether the TR7 switching can handle it as-is? > > > >Sage advice of the Drakelist greatly appreciated!!! > >John > > > >--- > > > >Checked by AVG anti-virus system (http://www.grisoft.com). > >Version: 6.0.622 / Virus Database: 400 - Release Date: 3/13/04 > > >Hi John -
The TR7 can handle the SB220/221 switching with no external relay/soft-key needed.
I have been using this combination for years with no problem.
Many of the newer rigs have rather flimsy relays and require a modification to the amplifier or installation of a "soft-key" to handle the current required to switch the SB220/221...NOT the TR7.
73,
Jay/AF2C
At 10:40 AM 4/9/04 -0400, you wrote:
Is anyone using this combination?
I wonder if it's advisable to use an external relay to control
the amp, or whether the TR7 switching can handle it as-is?
Sage advice of the Drakelist greatly appreciated!!!
John
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Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.622 / Virus Database: 400 - Release Date: 3/13/04
