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Author Topic: Pwr for TenTec 1340  (Read 377 times)
KA5ZCB
Member

Posts: 16




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« on: February 11, 2006, 03:55:18 PM »

I read the nice set of Reviews of the TenTec 13xx
QRP tranceivers.  Thanks for all the contributions.
I have the kit 'On Order'.  Now, to plan my Pwr.
I intend to operate during some (SUV) trips and
camping trips this year.  I'm considering the
PowerSonic 1222 (12v 2.5AH) or 1250 (12v 5AH)

The 1340 draws 30mA:rx and 700mA:tx
I suspect the 2.5AH is adequate... ??
I'd like the 5AH to have extra current
for other equip (I have the TT-1253 Gen-rcvr, too)
(I've yet to decide on Keyer, Tuner...)
Both batteries are the same price (~$17 at Mouser)

What is the "opinion" of PowerSonic Sealed-Pb ??
I plan to get the AAengr 'QRP Smart Charger'.

tnx for your feedback and assistance
for above equipment.  KA5ZCB in FtW.TX
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W5ESE
Member

Posts: 550


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« Reply #1 on: February 12, 2006, 06:22:49 PM »

It depends on how long you want to be able to go
between charges. I use a 12v 7AH panasonic gel cell
for my qrp rigs. That's enough for me to participate
in ARRL Field Day (a 24 hour contest) with my Ten-Tec
TKIT 1320 and other QRP rigs.

The voltage will go down as you deplete the battery,
and the power out is proportional to the square
of the battery voltage. And at some point, your
VFO will lose regulation, and the rig will get
drifty. You can't really draw down the battery
all the way.

7 AH gel cells are very common (they're often used
in uninterruptible power supplies for computers),
and you may sometimes find them on sale at Radio
Shack for less than $20. And sometimes used (but
usable) ones are at ham swapfests for $5.

73
Scott
W5ESE
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