[Amps] Dual tetrode in grounded grid

[Glen Zook]

The only problem with using RG58/U is that you are going to have a pretty large coil.  Also, resistors are definitely a lot cheaper even though I buy RG58/U in 500 foot spools for making the interconnect cable kits for various radios that I sell.

One "trick" that works when using tube type equipment is to put a 50 ohm load to ground on the input and then "tapping" this with a fairly small value capacitor.  Hallicrafters did this with the HA-2 and HA-6 to allow the use of 100 watt exciters and I did this on the input of the transmitting converter to drop the 8 watts from the exciter to about 2 watts that is required by the mixer.  Cheap and dirty, but it does work!

Glen, K9STH

Website:  http://k9sth.com


--- On Wed, 2/11/09, Carl <km1h at jeremy.mv.com> wrote:

RG-58 also makes an excellent attenuator