I bought an MFJ 25A switching supply for use with my (dare I say it on this
net) ICOM IC-706. For $150 this little supply works nicely, with just the
sound of its cooling fan. Have never had any complaints about noise on the
signal with SSB when the rig draws a bit over 20 amps. Don't know about on
CW since the little CW I do is done on the Argosy.
-----Original Message-----
From: John - G3JAG [mailto:patents@dx0man.prestel.co.uk]
Sent: Monday, November 08, 1999 09:56
To: Al Patrick
Cc: tentec@contesting.com
Subject: RE: [TenTec] Pegasus power supply . .
I tried a cheapo 25A PSU (switch mode) and it buzzed loudly
(I mean VERY
loudly) in time with my CW and SSB. It was audible all over
our home, so
I took it back. I got an even cheaper one and it works fine,
except for
some fan noise when it reaches the preset temperature. Its
OK as long as
its well out of the way under the bench, and on a thick
carpet. Both
supplies were from the Orient .. most of them are.
The moral is that they all work; some may not be all that
well
protected against over voltage and some may be extremely
noisy under
the cyclic loads typical of ham use. Analogue supplies are
best (for
me anyway). Try before you buy ...
This weekend I saw a humongous switch mode supply; 125 amps
at 12v. It
was fairly portable (I have seen computer supplies nearly
that size).
It was also UK built, new (surplus) and they wanted around
$350-400
for it. Now that would have handled my Herc II and Omni-V
very nicely,
but I decided that filtering hash from a 125 amp rail was
not trivial.
I'll stay with my T*T 9420 analogue supply. Its definitely
not portable,
but it works fine.
John G3JAG
On 08-Nov-99 Al Patrick wrote:
>
> Can anyone tell me why I should by the Ten Tec Power
Supply # 962 for
> $275 when I
> can find power supplies from about $100 up with the same
amperage? I
> found one for
> $149.95 that is 35A surge and 30A continuous which is
adjustable and
> regulated. I
> found another place that had linear amps (29#) with 35A
ICS and 25A
> Cont. which had
> front panel variable current and voltage controls and also
had volt
> and amp meters
> for $179.00 which is roughly $100 less than Ten-Tec's
(actually $96)
> and their
> switching power supply with 30A ICS and 25A Cont. was only
$139.
>
> I hear the Ten-Tec has a speaker built in, and it would be
nice to
> keep the Ten-Tec
> name, but are there other reasons I should get the 962?
>
> Thanks,
>
> Al
>
>
> --
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----------------------------------
E-Mail: John - G3JAG <patents@dx0man.prestel.co.uk>
To: <tentec@contesting.com>
Date: 08-Nov-99
Time: 10:24:41
This message was sent by XFMail
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