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Re: [Amps] Looking for Alpha 87A expertise

Subject: Re: [Amps] Looking for Alpha 87A expertise
From: Victor Rosenthal <>
Date: Mon, 15 Mar 2021 12:49:24 +0200
List-post: <>
There is a high-speed version of the 1N4007, the UF4007 whose recovery time is specified as 75 ns. That's pretty fast! See


The regular 1N4007 is more like 30 us. Still fast.


Victor, 4X6GP
Rehovot, Israel
CWops #5
Formerly K2VCO

On 15/03/2021 4:57, Benjamin Deovlet via Amps wrote:
I respectfully suggest that you do a google search for the
specifications sheets for both diodes and do a comparison. Ben, W6FDU
In a message dated 3/14/2021 7:53:08 PM Pacific Standard Time, writes: On 3/14/2021 10:16 PM, Jim wrote:

Doug ...

How fast is a PIN diode?  How fast is a 1N4007 in an Alpha 87? If
you have not measured their speed, how can you make that

It is my understanding that the 1N4007 (only) IS a PIN diode and I
have used them to replace PIN diodes in relay-less 2 meter
transceivers up to 35. Watts and normal operation and power were
restored. Without failing.

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