A Radio forum. RadioBanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » RadioBanter forum » rec.radio.amateur » Homebrew
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

Tenna Pyramid Phase III Model PS-12



 
 
Thread Tools Display Modes
  #1  
Old September 4th 06, 12:02 AM posted to rec.radio.amateur.homebrew
BobEmerson
external usenet poster
 
Posts: 2
Default Tenna Pyramid Phase III Model PS-12

Good Day All,

I have recently come into possession of a Tenna Pyramid Phase III Model
PS-12 and guess what? It does not work. I am inquiring as to the
availability of a copy of a schematic for this device. If someone could
email me a copy of it, I would be grateful.

Thanks
Bob Emerson


  #2  
Old September 4th 06, 02:33 AM posted to rec.radio.amateur.homebrew
g. beat
external usenet poster
 
Posts: 36
Default Tenna Pyramid Phase III Model PS-12

"BobEmerson" wrote in message
ups.com...
Good Day All,

I have recently come into possession of a Tenna Pyramid Phase III Model
PS-12 and guess what? It does not work. I am inquiring as to the
availability of a copy of a schematic for this device. If someone could
email me a copy of it, I would be grateful.

Thanks
Bob Emerson



Bob,

IF you are lucky - you may find someone that has a schematics for this
model.
http://www.repeater-builder.com/astr...ron-index.html

I would suggest that you get a copy of the Astron RS-12 power supply -- it
will be CLOSE.
http://www.repeater-builder.com/astr...ron-rs12a.html

Power supply uses the LM723 regulator IC (the most common for linear power
supplies of this type) AND pass transistors for the current handling --
usually 2N3055 or 2N3771.

Here is the 1996 DIY web article that spells out "how they work"
http://www.seits.org/features/pwrsup.htm

Repairing a linear power supply (education, tech sheets, troubleshooting) --
there are over 25 web pages here for any DIY of Astron, Pyramid, TrippLite,
etc.
http://www.kbt-dc-supplies.com/index.php

w9gb


  #3  
Old September 4th 06, 04:58 PM posted to rec.radio.amateur.homebrew
g. beat
external usenet poster
 
Posts: 36
Default Tenna Pyramid Phase III Model PS-12

"g. beat " @spam protected wrote in message
...
"BobEmerson" wrote in message
ups.com...
Good Day All,

I have recently come into possession of a Tenna Pyramid Phase III Model
PS-12 and guess what? It does not work. I am inquiring as to the
availability of a copy of a schematic for this device. If someone could
email me a copy of it, I would be grateful.

Thanks
Bob Emerson



Bob,

BTW, the LM723 will likely be soldered to the regulator PC board inside of
the Pyramid.

1. Carefully desolder the part (solder wick works best). NOTE, the
orientation of pin 1 on the PC board. The IC should have a notch for that
side OR a dot above pin 1 on the plastic top molding.
Dave Metz discusses this in the article -- I bookmarked in earlier message
for you (read this)

2. When you working with the LM723 regulator IC assure the large
electrolytic capacitors are DISCHARGED before removing OR inserting in the
socket (good way to destroy a perfectly good LM723).

Greg


  #4  
Old September 4th 06, 07:42 PM posted to rec.radio.amateur.homebrew
BobEmerson
external usenet poster
 
Posts: 2
Default Tenna Pyramid Phase III Model PS-12


g. beat wrote:
"g. beat " @spam protected wrote in message
...
"BobEmerson" wrote in message
ups.com...
Good Day All,

I have recently come into possession of a Tenna Pyramid Phase III Model
PS-12 and guess what? It does not work. I am inquiring as to the
availability of a copy of a schematic for this device. If someone could
email me a copy of it, I would be grateful.

Thanks
Bob Emerson



Bob,

BTW, the LM723 will likely be soldered to the regulator PC board inside of
the Pyramid.

1. Carefully desolder the part (solder wick works best). NOTE, the
orientation of pin 1 on the PC board. The IC should have a notch for that
side OR a dot above pin 1 on the plastic top molding.
Dave Metz discusses this in the article -- I bookmarked in earlier message
for you (read this)

2. When you working with the LM723 regulator IC assure the large
electrolytic capacitors are DISCHARGED before removing OR inserting in the
socket (good way to destroy a perfectly good LM723).

Greg


Sir,

Thank you for the answers. I'm in the process of reading all the
material and trying to make sense of it all. Thanks again

  #5  
Old September 11th 06, 05:37 PM posted to rec.radio.amateur.homebrew
Skipp says hello
external usenet poster
 
Posts: 1
Default Tenna Pyramid Phase III Model PS-12

You are one lucky guy today Bob. I have a copy the Pyramid Power
Supply already scanned in. I've fixed one or two in my day. The diagram
might be of a slightly different model/size but you can easily use it
to fix your same type supply.

I'll email a copy of my pdf scan to your email address below. If you
don't receive it (about 1MB file size) drop me a note direct at the
email links found on the web page.
www.radiowrench.com/sonic

good luck with your repairs...

skipp
skipp025 at yahoo.com

: BobEmerson wrote:
: Good Day All,

: I have recently come into possession of a Tenna Pyramid Phase III Model
: PS-12 and guess what? It does not work. I am inquiring as to the
: availability of a copy of a schematic for this device. If someone could
: email me a copy of it, I would be grateful.

: Thanks
: Bob Emerson
:

 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Test Equipment Service Manuals available Norm VE3CZI Boatanchors 1 March 30th 09 05:45 PM
Test Equipment Service Manuals available Norm VE3CZI Swap 0 August 16th 06 02:46 AM
Tenna Phase III schematic needed D & B Rude Shortwave 0 October 24th 04 06:09 AM
FA: Pyramid Phase III Regulated Power Supply: EBay Mark Petereit Equipment 0 March 8th 04 03:58 AM
FA: Pyramid Phase III Regulated Power Supply: EBay Mark Petereit Equipment 0 March 8th 04 03:58 AM


All times are GMT +1. The time now is 10:50 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 2004-2014 RadioBanter.
The comments are property of their posters.