[time-nuts] 5061B with 'Dead' tube - Options?

J. L. Trantham jltran at att.net
Sat Apr 7 04:28:34 UTC 2012


Paul,

Thanks for the reply.  I was wondering how that turned out.  I am wondering
if I can modify the existing DC Controller to supply a higher
voltage/current to get the higher temperature.  It would be nice to have it
all 'self contained'.

How did you monitor the temp and what voltage/current did you supply to the
heater?

Joe



-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of paul swed
Sent: Friday, April 06, 2012 7:18 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 5061B with 'Dead' tube - Options?


Joe that would be me and the Frankenstein of 5061s. I completely home brewed
a oven controller using a separate DC supply and feeding that to a
controller that I made. It allowed me to raise the temp and boil a very few
C's enough though to get the darned thing to run just barely. Funny thing is
I shut it down for 6 months. Recently fired it all up and after pump down
about 2 days the thing automatically came back up with 2nd harmonic and all!
I was quite shocked actually. This was a 5060 tube in a 5061 that had
originally had a low noise tube that was really dead. The 5060 tube was
given to me for shipping and it was considered rightly so dead by a fellow
Time-nut. You actually responded to me on some of the schematics for the
oven. So heck yes go for it. I have some notes on what I did as far as temps
went. But its whatever the tube said plus about 10 degrees as I recall. then
tweak and peak per instructions. I figure at the age these units are nothing
much matters and if you can get anything you won. It gave me a heck of an
education. Regards Paul WB8TSL

On Fri, Apr 6, 2012 at 6:53 PM, J. L. Trantham <jltran at att.net> wrote:

> I have a 5061B that appears to have a 'dead' tube.  It uses the 
> 05061-6044 DC oven controller and all appears to be functioning 
> correctly other than the CS Oven indication on the meter being 
> slightly lower than what I am used to seeing..
>
>
>
> I recall prior discussions about raising the CS Oven Heater voltage to 
> see if the tube can be 'resurrected'.
>
>
>
> Since the tube is apparently, otherwise, unusable, there appears to 
> nothing to lose.  I have been considering building a small DB9M to 
> DB9F cable to allow measuring all the voltages to the heater, etc.  
> Any suggestions to see if I can bring it 'back to life'?
>
>
>
> Thanks in advance.
>
>
>
> Joe
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to 
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
_______________________________________________
time-nuts mailing list -- time-nuts at febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.




More information about the time-nuts mailing list