[Johnson] My Viking II

Thu, 29 Jan 2004 05:59:27 -0600

Ken,

Since you've changed over to 6146Bs, you might want to check the screen 
voltage.  It appears that the screen voltage requirement for these tubes 
was not the same as was used on the 6146/6146A.  NJ7P's web site shows 
150 volts for the 6146/6146A, as opposed to 175 volts for a "B" (both at 
600 volts on the plate).  Someone with the RCA transmitting tube manual 
should be able to confirm this....

regards,

Mahlon - K4OQ

> --__--__--
> 
> Message: 4
> From: "KENNETH A CRIPS" <[email protected]>
> To: [email protected], [email protected]
> Subject: Re: [Johnson] My Viking II
> Date: Wed, 28 Jan 2004 12:57:27 -0700
> 
> Re: 6146B's in Vikings
> 
> I have read that excellent report on the 6146 tubes this is why I finally 
> installed the two 6146B's I have as a last resort all of My 6146's where 
> bad.  I am curious what does the transmitter do if it doesn't like the "B" 
> version.  I had it key down for 15 minutes solid last night with no problems 
> manifesting themselfs. As you all know the Viking II does not have any 
> adjustment for neutralisation.
> I'll have the final tweakling done this evening and then we will see what 
> happens.
> 
> 
> 
> Kenneth A. Crips Station W7ITC, Cheyenne, Wyoming
> 
> _________________________________________________________________