Scott Frankland interview from a few years ago on tubes & distortion

Forgive me if posted elsewhere, but I recently came across a fascinating interview with Scott Frankland of MFA amplifier fame from 2001 on the topic of tubes, distortion, feedback, triode v. pentode operation, thought it might be of interest.
It's from Issue 14 of Positive Feedback:
http://www.positive-feedback.com/Issue14/franklandinterview.htm

Would be interested to hear comments from others on this board far more conversant than me on such technical matters.

> Pappas: Why the change to EL34's? There seems to be a huge power
> penalty.
>
> Frankland: Because an EL34 amplifier has the potential for less
> distortion than a 6550 amp.
>
> Pappas: What's so special about the EL34?
>
> Frankland: For one thing, the EL34 is a true pentode. The 6550 is a
> beam tube. They have different conductance curves and therefore
> different distortion characteristics. RCA and Philips carried on a
> sophisticated debate in the '30s over which technology was better.
> Although the 6550 can produce more power than the EL34, the EL34
> needs less driver swing than a 6550 at any given power level. This
> means less distortion contributed by the driver stage.
>
> Pappas: So you're going for lower distortion in this new amp?
>
> Frankland: I'm going specifically for lower high-frequency
> distortion.

Perhaps this is why I prefer the EL34 to the 6550 in my modified Mark II amplifiers, despite the lower power output (which amounts to very little anyway). I just like their sound better with the EL34.

Vacuum Tube Valley Magazine seems unavailable at the URL.
Do anyone know where to find it now ?

Issue One: http://vacuumtubevalley.com/Magazines/VTV01a.pdf

Change the "01" to whatever issue you want.  Works through Issue 20.  How many were there, anyway?

GP49 wrote:Issue One:   http://vacuumtubevalley.com/Magazines/VTV01a.pdf

Change the "01" to whatever issue you want.  Works through Issue 20.  How many were there, anyway?

Thanks.
There was 20 issues i believe.

peterh wrote:
Vacuum Tube Valley Magazine  seems unavailable at the URL.
Do anyone know where to find it now ?

Great reading, perhaps a bit ahead of its time.

Here's an earlier thread on VTV, here on this forum:

https://dynacotubeaudio.forumotion.com/t1621-vacuum-tube-valley-magazines-free-downloads

deepee99 wrote:

peterh wrote:
Vacuum Tube Valley Magazine  seems unavailable at the URL.
Do anyone know where to find it now ?

Great reading, perhaps a bit ahead of its time.

Here's an earlier thread on VTV, here on this forum:

https://dynacotubeaudio.forumotion.com/t1621-vacuum-tube-valley-magazines-free-downloads

This link does not work for me, i get redirected to "http://www.jumpjet.info/#menu" where i cannot find any Vacuum Tube Valley Magazine(s).

peterh wrote:

deepee99 wrote:

peterh wrote:
Vacuum Tube Valley Magazine  seems unavailable at the URL.
Do anyone know where to find it now ?

Great reading, perhaps a bit ahead of its time.

Here's an earlier thread on VTV, here on this forum:

https://dynacotubeaudio.forumotion.com/t1621-vacuum-tube-valley-magazines-free-downloads

This link does not work for me, i get redirected to "http://www.jumpjet.info/#menu" where i cannot find any Vacuum Tube Valley Magazine(s).

Ditto here. This works: http://www.vacuumtubevalley.com/

Edit: Click on an issue, then do a cut and paste on the URL to the .pdf file for that issue.