Fwd: Re: SB220

[Greg@Bowser.com]

>Alex,
>
>The 57-27 diode was used in many of the kits as a general purpose
>rectifier.  It is the same as a 1N4005 and is rated at 600 volts at 1
>amp.  Years ago, I remember building a SB-220 for a person and I went out
>and purchased some other diodes that had a higher rating than the ones
>that Heath supplied.  If I was you, I would get some diodes that have the
>highest current and voltage rating that you can find and that would still
>mount on the board size wise.  Also, I parallel a resistor and a disc
>capacitor across each of the diodes as well but I dont remember the values
>that I used.
>
>Hope that this helps and lets see what the others have to say.
>
>Greg W8NGA
>Grove City, Ohio
>
>At 02:30 PM 12/25/03, you wrote:
>>I have an SB220 in near mint condition.  My problem is that when testing
>>according to the manual, the high voltage readings are a bit low, perhaps 400
>>volts low.  I think it may be the silicon diode stack in the high voltage
>>power
>>supply, but the manual and schematic only refers to them as silicon
>>diodes with
>>a Heath in-house part number of 57-27.  Does anyone know a good modern
>>substitute for these and a source for them?  Any assistance would be
>>appreciated.
>>Alex Kaplan, WA4AK
>>lawalexkaplan at aol.com

-----------------------------------------------------------
Products bought, sold or traded here is the responsibility of the
parties involved.  This list and the City of Tempe are not responsible
for losses or misrepresentations of any kind.  Buyer beware!

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
To post - HEATH at LISTSERV.TEMPE.GOV
Archives - http://interactive.tempe.gov/archives/HEATH.html