[Boatanchors] Homebrew Power Supply

[mac]

Joe,

Get yourself a power transformer with a 350-0-350 or 375-0-375 volt  
secondary, use a capacitor input filter and you'll get all the HV you  
need for your AF-67.  Got a big husky unit out of an old color
TV that's been running my AF-68 for years.  Don't use a bridge  
rectifier with the above voltages BTW, just a normal full-wave circuit  
which should give you something around 450 - 500 vdc out with the 16  
mfd input filter cap you mentioned.

You will need another, lower voltage supply for your PMR-7 and the  
exciter and audio circuits in your AF-67.

Dennis D.  W7QHO
Glendale, CA

********************
On Apr 8, 2013, at 11:08 AM, Joe Walden wrote:

> Hello,from Joe w5jdy in Okla...   I am in the process of building a  
> power
> supply for a Multi Elmac Transmitter model AF-67 and the Receiver  
> PRM-7....
> The particular specs I need is the power transformer secondary voltage
> ?ac-0-?ac....  This voltage is rectified with a solid state bridge  
> and has a
> 16 mfd input filter capacitor.......  I need the output voltage to  
> be 500
> vdc at 250 ma...   Any suggestions appreciated...     w5jdy at cox.net
>
> ______________________________________________________________
> Boatanchors mailing list
> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Boatanchors at mailman.qth.net
>
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com **
>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html