DX60 - The Plot Thickens

[Brian Carling]

Exactly Bob. The relay coil gets its voltage from the rear octal 
accessory jack.
The contacts go across the place where the HV gets turned on by 
the function switch contacts.
It seems to work out fine, but there are other problems here.
The first contact I made on 7040 kc. was with K5PSH, using his 
Drake 2NT and 2B station from Bryan, Texas.
He gave me a QSD report. My dits are almost dropping out.
Something is wrong with the keying circuits - it should
be easy to fix. They use grid-block keying and that is one 
of my favorite circuits... time to drag out the VOM again
and poke around in there some more! I will report back.





On 30 Dec 2005 at 15:03, Bob Macklin wrote:

> Brian,
> 
> Is the relay coil wired to the 115VAC contacts on the
> mode switch?
> 
> The HV winding on the transformer is speced at 260VAC.
> That's why I get by using a 230VAC transfomer for
> similiar power supplies. 260*2*1.4 = 728VDC. That is
> what the DX-60 is designed for.
> 
> Bob Macklin
> K5MYJ
> Seattle, Wa.
> 
> --- Brian Carling <bcarling at cfl.rr.com> wrote:
> 
> > Well, I had hoped to be on the air today, but my
> > shiny DX60 has 
> > been tormented with the addition of a RELAY under
> > the chassis
> > and it was wire dto short things out!
> > 
> > Until I removed this foreign object I was only able
> > to get 80V AC 
> > from the HV secondary and a LOT Of buzzing sound was
> > issuing 
> > forth from the power transformer. It didn't like
> > that one little bit!
> > 
> > Unplugged the relay and now I have 275V AC. Does
> > that seem 
> > high anough AC for a doubler and efficiency supply
> > that is 
> > supposed to provide B plus for a 6146? It still
> > seems low to me.
> > 
> > Fortunatley for me the relay is socketed. It looks
> > like a PTT mod 
> > that was wired wrong across the back of the function
> > switch!
> > 
> > Bry, AF4K
> > 
> 
> 
> 
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