Is the AF output tube in the R4A swappable with the same tube in the 2-B? I
Googled but it is not clear. Btw, what is a beam pentode or tetrode? Is 6EH5 in
V7 one of these?
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Drakelist@zerobeat.net
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No. The 2-B uses the 6AQ5 and the R-4 Series all use the 6EH5.
The 6EH5 is not a Beam Power Pentode, the 6AQ5 is.
The third 'grid' in a Pentode can be either a spiral wrapped grid like the other two, OR it can be
'plates' that 'focuses' the electron beam more fully on the Plate. Primary resul
My recently-acquired R-4B is now doing transceive duty with my T-4X while the
R-4A awaits PTO redemption.
I found that the PO moved the INJ jack to one of the SPARE locations. Don't
ask me why. Hooked INJ from the T-4X there and Voila! Garey's CD with the
view of the INJ cable clearly showed
FWIW, there is a good illustration and explanation of
beam power tubes in all of the old RCA tube handbooks. In
fact, these books have an excellent primer on tubes and
their applications in the front. Well and clearly written.
Note: do people on this list prefer top replies or
bottom?
Some days I am more easily amused than other days.
http://www.k0to.us/HAM/FT1000MP/Temperature%20Stabilized%20FT1000MP%20REF%20oscillator_files/Temperature%20Stabilized%20FT1000MP%20REF%20oscillator.htm
What led me to the above link was a discussion of drift in the IC-706 radios on
another list
Jim -
Nothing funnier than a bunch of SSB types sitting on 3975.00 MHz (or so they think!) and spend
hours fighting over who's transmitter is 150 Hz high, (or low,) when NONE of them are actually on
3975.00!!! I was not aware that the FCC had changed us from ham bands to CB type channe
On Thu, 25 Aug 2011 21:19:39 -0400, Garey Barrell wrote:
>Nothing funnier than a bunch of SSB types sitting on 3975.00 MHz (or so
>they think!) and spend
>hours fighting over who's transmitter is 150 Hz high, (or low,) when NONE of
>them are actually on
>3975.00!!! I was not aware tha
On Thu, 25 Aug 2011 16:34:03 -0700, Richard Knoppow wrote:
>
> Note: do people on this list prefer top replies or
>bottom? I got a private e-mail asking me to change to top
>posting so I am trying it.
It varies. In the dialup BBS scene where I cut my online teeth, bottom posting
was the s
The 6AQ5 is designed to work with 250V on the plates, and was operating at reduced efficiency in the
2-B.
By the time the 4 Series was designed, the 6EH5 was introduced, and was
designed for 150V plate supply.
A tube amplifier Class operated A sounds so much smoother than any solid state discr
Richard -
I prefer top posting. It works better for me because I can see the most recent comments/edits
immediately, and if I need to see what is being referred to, or further clarification, I can scroll
down and find it.
Bottom posting only makes sense if you expect the recipient to read th
On Thu, 25 Aug 2011 21:53:42 -0400, Garey Barrell wrote:
>And another thing. :-) CHANGE THE SUBJECT WHEN THE SUBJECT CHANGES
> :-)
Stop changing the subject, Garey
73
-Jim (running and ducking)
--
Ham Radio NU0C
Lincoln, Nebraska, U.S.S.A.
TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/
just to add insult to injury, the wisecrack was BOTTOM POSTED!
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
Jim Shorney wrote:
On Thu, 25 Aug 2011 21:53:42 -0400, Garey Barrell wrote:
And another thing. :-) CHANGE TH
Yeah, I'm like that sometimes. ;>
On Thu, 25 Aug 2011 22:15:57 -0400, Garey Barrell wrote:
>just to add insult to injury, the wisecrack was BOTTOM POSTED!
--
Ham Radio NU0C
Lincoln, Nebraska, U.S.S.A.
TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A, GT550A/RV550A,
HyGain 37
Top posting preferred.
~Damon Raphael, W7MD
On 08/25/2011 04:34 PM, Richard Knoppow wrote:
> FWIW, there is a good illustration and explanation of beam power
> tubes in all of the old RCA tube handbooks. In fact, these books have an
> excellent primer on tubes and their applications in the fr
- Original Message -
From: "Jim Shorney"
To: "drakelist"
Sent: Thursday, August 25, 2011 6:36 PM
Subject: Re: [Drakelist] AF output tube in R4A
On Thu, 25 Aug 2011 16:34:03 -0700, Richard Knoppow wrote:
Note: do people on this list prefer top replies or
bottom? I got a priv
On Thu, 25 Aug 2011 20:54:15 -0700, Richard Knoppow wrote:
>I was taugh that correct usage and punctuation
>was important and that people would judge you by it. I think
>now that I was simply taught to be an intellectual snob.
>Anyone can be one, you don't need a lot of money or an
>impressive
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