[AMPS] Pin Diode Information

[skipp isaham]

Terry,
-
I don't have Alpha specific information, but I do have a 
moderate file of stuff related to HF&VHF amplifiers
and pin diode switching... 
-
I have the Heathkit SB-1000 pin diode board up on 
the http://sonic.ucdavis.edu  server. 
-
I have copies of the large HF amplifier pin diode 
project which appeared in HR Mag (RIP) and have 
one of the working QSK-1500 units made in Ohio. 
The HR article is by/from the people behind the QSK 
unit.  
- 
I have some HP pin diode information and some 
of my own lower power conversion information from 
circuits I have worked with. 
-
I have a pin diode conversion article for a 10 watt 
223Mhz radio. I have misc pin diode conversion 
information as copied and stuffed in the file.  
- 
Copies of the above can be had for free to patient 
and interested people. 
- 
For sequencing, the problem is easy.  The ARRL 
Handbook from years ago has a Satellite Preamp 
Sequencer which works very well, has multiple 
output logic and is easily tweaked for special 
needs. 
The best part of the ARRL Board is that one can 
purchase new bare circuit boards of said from 
FAR Circuits in any quantity, cheap. Check their 
web site for details on the board purchase.  
- 
In regards to the measured speed of a RJ1A or 
HC1.  I had reason the measure a few in various 
circuits which include designs similar to the 
speed up circuit in/on Rich's web site. 
- 
The most rapid bounce free relay switching speed 
I was able to obtain was in a range of 3.5 to 5mS. 
Connections were made at 2mS with much contact 
bounce. I would not trust a completed connection 
in less than 4mS in the (quantity 8)  CA relays I 
have here. 
- 
I believe vacuum relays are obviously much better 
than original relays and very fast. The HF Pulse 
Switching circuit I tested the relays for was 
completed with New Generation APT parts. 
- 
cheers 
skipp 
- 

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