I've seen some discussion here regarding the ability to use a tube cage with a tall GZ33 rectifier but I've never seen a conclusion as to whether it will fit or not. Can somebody with a tube cage measure the clearance? Looks like the GZ33 is about 5" base to top. Thanks!
4 posters
Tube Cage with Tall Tubes
Sal- Posts : 221
Join date : 2009-02-05
Location : Central New Jersey Dynaco-ST70.com
- Post n°2
Re: Tube Cage with Tall Tubes
I'll check tonight when I get home from work. Are we talking about the ST-70?
Sal
Sal
Bob Latino- Admin
- Posts : 3258
Join date : 2008-11-26
Location : Massachusetts
- Post n°4
Re: Tube Cage with Tall Tubes
Hi,
That Mullard GZ33 won't fit under the tube cage. If you run an ST-70 with the taller GZ33 (CV5745) then you will have to play the amp with the cage off ..
Bob
That Mullard GZ33 won't fit under the tube cage. If you run an ST-70 with the taller GZ33 (CV5745) then you will have to play the amp with the cage off ..
Bob
baddog1946- Posts : 319
Join date : 2010-02-03
Location : Costa Rica
- Post n°5
Re: Tube Cage with Tall Tubes
Hi:
Those KT-120's also measure out to be right at 12 cm. (5")tall.
Baddog1946
Those KT-120's also measure out to be right at 12 cm. (5")tall.
Baddog1946
Bob Latino- Admin
- Posts : 3258
Join date : 2008-11-26
Location : Massachusetts
- Post n°6
Re: Tube Cage with Tall Tubes
baddog1946 wrote:Hi:
Those KT-120's also measure out to be right at 12 cm. (5")tall.
Baddog1946
Hi Baddog,
You know, I just measured a KT120 and it measured out at about 4 5/8" tall. A KT120 will probably fit under the cage although I have not tried it ? When that cage is all the way down you have *about* 4 3/4 - 4 7/8 inches of clearance under the cage. The GZ33 definitely won't fit under there but I think a Tung-Sol KT120 will.
If anyone is running a KT120 Tung-Sol (which is a pretty tall tube also) on an ST-120 let me know if it will fit under the cage? I *think* it will. If I have time tomorrow I will try a KT120 under the tube cage and double check that the cage doesn't bang on to the top of the the KT120.
Bob
baddog1946- Posts : 319
Join date : 2010-02-03
Location : Costa Rica
- Post n°7
Re: Tube Cage with Tall Tubes
Hi Bob:
I just tried it and it seems like it does actually fit with a thin hair to spare (I would say about 1/8" on my amp) but IMHO it is still too close for comfort.
The metal of the cage could act like a heat sink to overheat the tube with such close proximity Those 120's throw a lot of heat.
I will not use the cover when they are in use. Better safe than sorry.
Baddog1946
I just tried it and it seems like it does actually fit with a thin hair to spare (I would say about 1/8" on my amp) but IMHO it is still too close for comfort.
The metal of the cage could act like a heat sink to overheat the tube with such close proximity Those 120's throw a lot of heat.
I will not use the cover when they are in use. Better safe than sorry.
Baddog1946
Sal- Posts : 221
Join date : 2009-02-05
Location : Central New Jersey Dynaco-ST70.com
- Post n°8
Re: Tube Cage with Tall Tubes
I must apologize, I totally forgot about measuring the height of the cage, on a ST-70 the maximum internal height you have is 4 1/2 inches as the octal tube socket is raised a little on the chassis.
Sal
Sal
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