GB> RE: DX60 - On the air!

[Brian Carling]

OK fixed my DX60 (mostly) - the relay under the chassis is 
not actually a PTT mod. like I had thought...
It is to replace damaged contacts on the front wafer
of the function switch!

Now it works, but needs the full 120V AC to make the relay pull in.
The scary humming sound was the relay not quite pulling in.
The relay just turns on the High Voltage, all of 600 V DC!

The burning smell came from the 6DE7 modulator stage which 
has been wired wrong. This rig has probably never been on the air 
since it was assembled,
although the wiring job looks very professional.

You see the 100 uF cap is MISSING from the cathode of V4, the 
6DE7 and the RESISTOR in the cathode, instead of reading 33 K-
ohms, measures about 33 ohms! and is burnt looking! HI hi!

DOn't we have some fun adventures on these old rigs.
Well I tried a 90 watt CQ on 7040 and no one came back. Suppoer 
is ready.
Will try again later....
WHERE are the Ameco AC1 guys?

73 de AF4K, Bry

On 30 Dec 2005 at 18:01, Brian Carling wrote:

> OK I found another DX60 manual (poaper) and this one shows the 
> voltages. It says 280V AC across the HV secondary so looks like I 
> have fixed the stupid problem by unplugging the badly bodged
> modification of a PTT relay add-on!
> 
> You guys should see this DX60B. The chassis is so clean and 
> shiny, I could comb my hair by using it as a mirror!
> Inside and out looks almost like new... oine or two cruddy areas, 
> but you could hardly guess that is (probably about) 40 years old!
> 
> See you all on the air soon!
> On 30 Dec 2005 at 17:49, Brian Carling 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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