Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Oddvar on September 07, 2017, 11:46:35 am
-
Hi, I was wondering if there are some EL34 tubes that are a bit shorter than others. I need it in a tighter place?
-
:l2: that sound like a personal issue :icon_biggrin:
-
This is the standard for EL34 tubes
(http://i.imgur.com/1BKi4dQ.jpg)
may be there are some brand that are a bit less tall (max 98mm) but isn't easy to know which brand they can be
if you have problems about, a solution may be to mount the sockets inside the chassis (instead than on the top)
using a pair of small standoff columns like those that Doug sell
http://hoffmanamps.com/MyStore/perlshop.cgi?action=template&thispage=BoardBuilding&ORDER_ID=802394713 (http://hoffmanamps.com/MyStore/perlshop.cgi?action=template&thispage=BoardBuilding&ORDER_ID=802394713)
to obtain something like this
https://www.tubecad.com/2011/10/blog0215.htm (https://www.tubecad.com/2011/10/blog0215.htm)
(http://i.imgur.com/lS6O48b.jpg)
Franco
-
Put 2-inch holes in cabinet above tubes. Get 2" vent grills from the siding and soffit aisle at the home store.
I do not know why the EL34 is so tall. If there is a shortie, I can't recall seeing it.
Note that "most" EL34 amps will work fine with 6L6, which is often shorter. Not the same overdrive sound, so may not be your thing.
-
There are some short base EL34s but the overall height of the glass is still the same.