by "Iain Churches" <IainNG@[EMAIL PROTECTED]
>
Apr 22, 2008 at 06:23 PM
"Ian Thompson-Bell" <ruffrecords@[EMAIL PROTECTED]
> wrote in message
news:fukueb$1bq0$1@[EMAIL PROTECTED]
> Iain Churches wrote:
>> I never put the tube base on the board anyway. I use a
>> construction method that I have seen in British mil spec
>> equipment with a metal sub-plate to which the tube-bases are
>> fixed, below the amp top panel. The PCB is fixed below the
>> plate with 3mm machine screws and standoffs. . There is a
>> hole in the PCB about the size of the tube base, and short
>> wires are soldered to the base tags, and taken out to pads
>> or turrets on the PCB.
>>
>> The military used red for anode, blue for cathode and green for grid.
>> I do the same.
>>
>> http://www.kolumbus.fi/iain.churches/Pics/105Board05.jpg
>>
>>
>
> Excellent idea, and the metal plate acts as a screen too. Neat.
>
It has the added advantage also of no heat being dissipated from the tube
into the PCB. via the tube base.
regards
Iain
