EZ81 EL84 spacing

[DaveW]

How close can I space an EL84 from the EZ81. A change of plan forces me to squeeze another pre amp tube in so I thought I would drill a new hole for one of the EL84s and move the rest across.

Thanks for reading,

Dave

[Fredaxis]

Hi Dave,

Look at the picture, this is how close it is in the amp I am converting in a LiteIIb.
http://www.18watt.com/modules.php?set_a ... _photo.php

Fred.

[DaveW]

Thanks Fred,

Mine won't be that close!

[Blue-Casket]

What could happen if you place the tubes too close to each other ?

[PeterS]

Look at the picture, this is how close it is in the amp I am converting in a LiteIIb.

Those spiral wire tube shields look interesting, I've never seen anything like them.

[Alexo]

What could happen if you place the tubes too close to each other ?

Heat. Many datasheets list the minimum distance between tubes. Interestingly, one of our members (1950?) did some experiments, blasting a running amp with a propane burner to see how the tone was affected - after about 10 minutes, the EL84's started redplating!

[Blue-Casket]

thanks for the information about the heat
but of course if you place the tubes in a closed area where almost no cool air ventilates the tubes u will reach high temperatures after a while too i fear.