[Heathkit] DX 40 problems need some ideas.

[Glen Zook]

Are you using a 6146 / 6146A for the final amplifier
or a 6146B?  The 6146B is NOT the same tube as the
6146 / 6146A and often causes problems like what you
are seeing.  Sometimes they work, but, more often than
not, they won't work in most of the "boat anchor"
transmitters.

Glen, K9STH


--- Joe Yamond <bbc39668@yahoo.com> wrote:
> Hello everyone,
> I am trying to bring my DX 40 to life but I am
> having
> some problems and am wondering if others have seen
> similar issues with this rig and could share some
> info
> as to locating and resolving.
> What I am finding is that I get very little output
> on
> 20-15M and on 10M no output plate wont dip. I am
> using
> a 7040 xtal and have tried others in 40 M range. I
> am
> getting a good grid current indication though abt.
> 3mA. Voltages seem correct I replaced all the tubes
> with no change. Some things I noticed when rig is
> tuned up and keyed in 20-15 M plate current swings
> to
> max on meter and the settles back to proper reading 
> and rig produces only abt 10 Watts output. I believe
> the problem is in the osc or buffer section as I
> also
> notice that the 6CL6 osc. tube will glow BLUE inside
> when I key the rig it will do this in TUNE position
> also. I remember reading about tubes doing that and
> its not a good thing but I cant remember why it
> happens. I also have a VF1 I converted to solid
> state
> following Ishmaels writeup in ER and I attempted to
> try that and I actually hear a hum from the rig when
> keyed and get a similar result. 
> Thanks for reading and any info is greatly
> appreciated.


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