[NJARC] Heathkit DX 60

[n3ibx]

Larry,
         From the power outputs you've described, it appears as if 
everything is working FBOM. Don't expect as much power on the higher bands 
as the lower ones.  Do you plan on using it on CW , 'Fone, or both? I hear 
plenty of DX-60's on AM and they seem to make a pretty good account of 
themselves. I'd recap the power supply, replace all of the old 
electrolytics, etc, to give it some integrity. Power output on 'Fone should 
be in the neighborhood of 20W or so. It uses carrier controlled AM. Any hi-Z 
mike should work fine with it.

The best of luck and a lot of fun with it.
Regards,
            Joe Cro N3IBX
----- Original Message ----- 
From: "Larry - WA2DGD" <wa2dgd at comcast.net>
To: "NJARC Reflector" <njarc at mailman.qth.net>
Sent: Sunday, April 24, 2005 11:50 AM
Subject: [NJARC] Heathkit DX 60


> Visit our web site - See http://www.njarc.org
> _______________________________________________
> Hello,
>
> I picked up a heathkit dx60 transmitter and decided to make a restoration 
> project. Actually it is in very decent shape. Its been a while since my 
> tube days so have a few questions.
>
> Its rated at 90 watts INPUT which makes sense since when tuned up plate 
> voltage is approx. 600vdc and plate current is 150ma. I'm just not sure 
> about how efficient its supposed to be. The following are the output 
> powers per band using a 7.030 mhz crystal into a dummy load. (don't have 
> an 80 mtr. xtal to test with).
>
> 40 meters 55 watts output
> 20 meters 52 watts
> 15 meters 45 watts
> 10 meters 35 watts
>
> The rig seems to work fine, only other issue I notice is that the (-) bias 
> voltages on the driver and final PA are 20-30% lower than the manual 
> states.
>
> Any comments appreciated.
> -- 
> 73
> Larry
> WA2DGD
>
> _______________________________________________
> NJARC mailing list
> NJARC at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/njarc