HW-101 Balanced Modulator Diodes

[Gerald C. Lemay]

They migght have been 1N5711 if memory serves me correctly. Modern
manufacturing techniques are such that you don't really have to have
matched quads. The application in the Heathkit balanced modulators as well
as the SB-303 product detectors are not very demanding. The schottkys will
improve carrier suppression and reduce distortion in the SB-303. A
worthwhile modification.

> Yes, we did it at Heath with some HP ones - I can't remember the
> number.
>
> Murray
> ----- Original Message -----
> From: "Richard H. Arland" <rarland at EARTHLINK.NET>
> To: <HEATH at LISTSERV.TEMPE.GOV>
> Sent: Tuesday, May 21, 2002 5:13 PM
> Subject: HW-101 Balanced Modulator Diodes
>
>
>> Has anyone ever tried substituting Schottkey diodes for the 1N191
>> diodes in the balanced modulator for the HW-101?
>>
>> Currently I am rebuilding one and figured that now might be the time
>> to replace the diodes rather than after I reassembled the entire unit.
>> I plan on pulling the diodes and checking them out-of-circuit and
>> replace the entire diode ring should one be bad.
>>
>> 73 Rich K7SZ
>>
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>
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