Jim, Jerry -
Good points - much appreciated.
The project I have in mind is a 6M amp using a GI-7B tube that can be used when
roving (12V supply), so the Hercules 2 (or Metron MA-1000B, or a few others)
aren't a solution (I should have mentioned this in the first place.)
I gather "pure sine wave" inverters as a rule generate much less RFI, so that
seems like a good choice, but much higher cost/watt. They often seem to claim
~90% efficiency which is promising. Do inverters usually tolerate rapidly
fluctuating current demand like found in SSB/CW transmitting? Anything to look
for for this kind of application?
Keeping the filament on via DC power would certainly be easy enough for the
GI-7B - I'm not sure of the start-up time for an inverter (fast enough for
semi-break-in CW? If the inverter is only used in transmit, a square wave
inverter might be acceptable?)
Thanks again,
>Subject: [Amps] Use of 12V/115V inverter to power small tube amp?
>
>Any issues/suggestions/ideas/pointers to previous discussions re using a
>12VDC/115VAC consumer inverter for powering of a small tube amplifier
>(assuming adequate/stable 12V DC source, of course)?
>
>Example inverter:
>http://www.harborfreight.com/750-watt-continuous-1500-watt-peak-power-inverter-66817.html
>Example amplifier:
>http://www.ameritron.com/Product.php?productid=AL-811
>
>Tks,
>
>Dave
>
>NOISE, NOISE, NOISE, NOISE! This sort of product is notorious for
>generating bodacious RF noise, and you can't turn it off on RX because
>you must keep the filaments going.
>
>73, Jim K9YC
>*** Unless you have a linear that lets you run the filaments direct off
>the car battery. I have a couple of SBE SB2-LA's that have that feature.
>I would imagine that the Heathkit HA-14 "Kompact Kilowatt" did also.
>Wait, it used 572B's - so you can just turn the filaments off for receive.
>
> - Jerry Kaidor
>If you've got a stiff 12V source, a better solution is to find a good
>used Ten Tec Hercules II, a very nice solid state amp for 160-10M that
>runs on 12-14VDC and puts out about 550W.
>
>73, Jim K9YC
>
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|