Silicon Chip Valve Pre-amp

[Alan Peake]

Just got the November SC and read the article with interest. However, the
first thing that struck me was that the 12AX7 shown in the photos, looked
remarkably like a 12AT7. I just fished a 12AX7 out my memorabilia box and sure
enough, it has the much taller anodes. The 12AT7s in the self-same box look
just like the one in the SC article.
Anyone else notice this?
Alan

 

[Phil Allison]

"Alan Peake" <adpeake@nospam.internode.on.net> wrote in message
news:adpeake.133.001F9558@nospam.internode.on.net...

Just got the November SC and read the article with interest. However, the
first thing that struck me was that the 12AX7 shown in the photos, looked
remarkably like a 12AT7. I just fished a 12AX7 out my memorabilia box and
sure
enough, it has the much taller anodes. The 12AT7s in the self-same box
look
just like the one in the SC article.

** There is a lot of variability in valve internal structure design - even
with the same type number.

Typically, 12AT7s have smaller anode structures than X7s - but this
is not always so.





........... Phil

 

[The Real Andy]

"Phil Allison" <philallison@optusnet.com.au> wrote in message
news:3fa37a09$0$2239$afc38c87@news.optusnet.com.au...

"Alan Peake" <adpeake@nospam.internode.on.net> wrote in message
news:adpeake.133.001F9558@nospam.internode.on.net...
Just got the November SC and read the article with interest. However,
the
first thing that struck me was that the 12AX7 shown in the photos,
looked
remarkably like a 12AT7. I just fished a 12AX7 out my memorabilia box
and
sure
enough, it has the much taller anodes. The 12AT7s in the self-same box
look
just like the one in the SC article.



** There is a lot of variability in valve internal structure design - even
with the same type number.

Typically, 12AT7s have smaller anode structures than X7s - but this
is not always so.

What ever it is, it's all a load of shit and a waste of money.