Hi Jim,
I use heatresistant glass cylinders I get made locally and also use
round teflon covers as you, thats works very well.
All my blowers are made by EBM.
I do not like to boost a tubes rating, I rather prefer then to use a
bigger one.
I prefer that my GG amps cannot run in too high dissipation at full
drive. They should have no problem when the antenna gets lost...
73
Peter
--- In ham_amplifiers@..., "pentalab" <jim.thomson@...>
wrote:
For an experiment, I remember W7IUV had fabricated a >fiberglass
box around his YC-156.. for a chimney.
We tried the same trick... except the vertical sidewalls were
made from wood... about 9" square... top was also made from
wood.... and the original chimney was placed in a groove.. on
top of this wooden affair. Now we could increase the hole
sizes on the chassis.
The result was a huge improvement! Intead of the original 205
cfm... we are now getting an easy 320 cfm [using a Dayton
5C508 dual speed, capacitor start blower].
