[Drake] China made tubes

[Bob Camp]

Hi

Is there a data sheet on the tubes?

One of the "interesting" situations with tubes these days are close 
equivalents being relabeled as something they are not. Generally the 
tubes will plug in and run. The issue is that they may not work quite 
the same way as the original parts.

If you are into audio the various 6L6 flavors and variations are beyond 
comprehension without an encyclopedia of data and a few years to work 
it all out. Fortunately we have not gotten to quite that point on RF 
tubes.

	Take Care

		Bob Camp
		KB8TQ



On Mar 14, 2005, at 9:38 PM, Glen Zook wrote:

> Just make sure that your rig was designed for the
> 6146B / 8298A series and not the 6146, 6146A, or 8298
> tubes.
>
> For the article on the 6146 family of tubes that was
> published in Electric Radio a while back, and which
> has been reprinted in several other publications, go
> to either of the websites that are listed at the end
> of this message.
>
> Most transmitters that were designed for the earlier
> series are not very "happy" with the 6146B series.
> The 6146B is really a different tube from the earlier
> versions.  RCA originally said that the 6146B was
> completely compatible with the earlier versions then
> had to retract that statement.  There are exceptions
> with individual transmitters and the 6146B functions
> fine.  But, I have seen like 3 exact models of the
> same transmitter, with serial numbers less than 10
> apart, that the 6146B worked fine in 1 but not in the
> other 2.
>
> I won't go into all of the possible problems that can
> happen if you use the 6146B / 8298A tubes in rigs
> designed for the earlier tubes since that would
> definitely exceed the line limit of this reflector.
> But, all of the problems are described in the
> articles.
>
> Glen, K9STH
>
> --- Mel Vance <icra at galaxynet.com> wrote:
>
> Found a site with new, right of the line, China made
> 6146b tubes....at about half the cost I have found elsewhere.
>
> Glen, K9STH
>
> Web sites
>
> http://home.comcast.net/~k9sth
> http://home.comcast.net/~zcomco
>
>
> 		
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