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Telamon · February 9th 08, 07:20 PM posted to rec.radio.shortwave

In article
,
wrote:

On Feb 9, 7:00*am, Telamon
wrote:
In article
,

Tell me you are not buying this transceiver for SWL.

In any event you better be real careful with an inverter powering this
transceiver as it looks to have an auto switching power supply in it.
You would be safe with a 115V inverter but you might see trouble ahead
with a 220V inverter. I've seen inverters hiccup when a load is switched
on, which might cause the auto switching supply to go into the doubling
mode for 115V. When the inverter recovers to 220V you will be lucky if
all that happens is you blow a fuse. Whether or not you have a problem
might depend on timing. Where the inverter is in the AC cycle when you
happen to switch on the radio may determine if a failure event occurs.
Having some load on the inverter like a lamp before you switch on the
radio may help stabilize the situation. Good luck.

Thanks Telemon and all of you for your replies.
The 7700 certainly draws a lot of current on receive mode only.

It will be used for listenig only and I will disable the transmit
through the internal software.
I was hoping to take it to our powerless Seefontein DX site, but the
problems Telemon highlights and the huge 12v DC current draw means I
would need massive batteries, so I wont take it.

Instead I will keep my Icom IC-756PRO III for the DXpeditions.

The ICOM on receive is not out of line with SWL table top receivers.
My R8B specification states it draws 2 amp at 11 to 16 volts (27 watts)
DC power and the AC power is about 40 watts.

--
Telamon
Ventura, California