[Elecraft] Pyramid Power Supplies

[Greg Beat]

> Date: Mon, 13 Oct 2003 08:41:26 -0700 (PDT)
> From: David Toepfer
> Subject: Re: [Elecraft] Pyramid Power Supplies
> To: Elecraft Reflector <elecraft@mailman.qth.net>
>
> I would be interested as well.  I was last looking at the 32/35W model.
>
> dt
>
>--- "William M. Spaulding, Sr." wrote:
>
> Hi, Folks,
>
> Has anyone had experience with Pyramid power supplies?  Several sources
> offer them at what appears to be bargain prices.
>
> I have my eye on a Pyramid PS-26KX in particular.
>
> Bill
> NA7Y

For LINEAR power supplies, in my experience, I have regularly found dead
Pyramid supplies at hamfests.
These are a good source for parts in building a new power supply (see Metz
article below).
If you are building an Elecraft kit (K1, K2, etc.), why now build a power
supply?

I have a preference for Astron over Pyramid - because Astron is established
in the commercial
business radio market, solid design, supported by mfg. and extensive
technical information on Internet.
Astrons regularly appear in the surplus market (eBay, hamfests) for
substantially less than new.

Components are similar in these commercial supplies, BUT the difference is
in the quality of parts
procurement, assembly and original design.   Examine these LINEAR power
supply web sites:

KBT DC Supplies - Informational site & repair service
[Select topic by choosing from left frame]
http://www.kbt-dc-supplies.com/index.php

David Metz, WA0AUQ article [Power Supply construction]
http://www.seits.org/features/pwrsup.htm

Schematic
http://www.seits.org/features/pwrsup.gif

Astron technical information
http://www.repeater-builder.com/rbtip/astron-index.html

Greg
w9gb