[Boatanchors] Re: [Hallicrafters] SX-28 Update

[Edward B Richards]

1. No. More likely that tube is pulling too much current, probably due to
wrong bias. (leaky couplimg capacitor) or a shorted tube.

2. Check the grid voktage. any + voltage indicates 1. above.


3. That will probably work but why not find and fix the problem?

73, Ed Richards K6UUZ
Simi Valley, Ca 93065
Home of the Air Force 1 pavilion

On Thu, 23 Feb 2006 19:06:08 -0500 carolew <carolew at bellatlantic.net>
writes:
> 
> Here's where I stand:
> 
> 1.  If I remove the back 6V6 (the one behind the 5Z3 and the front 
> 6V6), there
> is no smoke. This suggests to me that that part of the primary is 
> shorted. The
> interesting thing is that even with one 6V6 removed, the radio plays 
> great and
> has more than enough volume. Do you agree that this shows that the 
> primary is
> shorted?
> 
> 2. I checked the cathode voltage. It is about 16V, well within the 
> margin of
> error of my voltmeter. Further, the resistance from cathode to 
> ground is 200
> ohms, right on the money.
> 
> 3. I'm thinking of leaving it alone and playing it with the one 6V6 
> removed. Any
> thoughts?
> 
> Finally, I want to think everyone for their help. One of the biggest 
> differences
> between collecting now and collecting back in the 1970s, when I 
> started, is that
> I can draw on the collective (and very impressive) expertise of this 
> group.
> 
> Joe Connor
> 
> 
> 
> ______________________________________________________________
> Hallicrafters mailing list
> Home: http://mailman.qth.net/mailman/listinfo/hallicrafters
> Help: http://mailman.qth.net/mmfaq.html
> Post: mailto:Hallicrafters at mailman.qth.net
> ----
> List Administrator: Duane Fischer, W8DBF **for assistance**
> dfischer at usol.com
> ----
> Hallicrafters Collectors International: http://www.w9wze.org
> 
>