[TenTec] TenTec Digest, Power Supplies

[Don Allen]

I use two Astron RS-35M supplies which are on the carpeted floor beneath 
the operating desks for the HF rigs, with the exception for the 280 
linear for my old Omni A Series B.   I've tested a number of switching 
supplies, including the Astron SS-30M, the Samlex units, and others.  
The best of the lot IMO is the Alinco DM-330MV (built in Japan BTW).  I 
have one in my station, but only use it for my VHF/UHF gear.  I've used 
it on HF for testing purposes, and it's good, plus you can move any 
perceptible hash off frequency with the noise offset control - a rather 
unique feature.  And, most important for a switcher, the fan is 
practically inaudible due to the extensive use of heat sink - the entire 
top of the PS is a heat sink.  The Chinese have copied the Alinco 
design, and several companies, such as QJE, now sell it, but I assure 
you the performance is not the same.

73
Don W9CW



On 9/8/2012 12:20 PM, Richards wrote:
> Ah... yes.... and therein lies the rub...."almost no noise"  is not as 
> good a "none."   My TT Model 963 switcher produces noticeable noise on 
> frequencies outside the ham bands.
>
> I did notice TT no longer sells the  Astron-made Model 963, and I 
> believe (i.e., guess) the current model is made by Samlex.
>
> I would probably try a Samlex supply if I wanted another switcher, for 
> the above, and other reasons.
>
> ----------------------  K8JHR  --------------------------------
>
> On 9/8/2012 11:40 AM, Carl Moreschi wrote:
>
> The current switcher supplies are now mostly very good and
>> produce almost no RF noise.
>>
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