Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

   Home   Help Search  
Pages: [1]   Go Down
  Print  
Author Topic: Alpha 76 ON/OFF switches  (Read 2653 times)
K6UJ
Member

Posts: 315




Ignore
« on: October 29, 2012, 08:05:52 PM »

I need to replace the two side by side switches and the plastic push buttons for ON/OFF
on my Alpha 76CA.   A number of Alpha amps use the same switches, Alpha 78 etc.
RF Concepts doesn't stock these and I cannot locate a supplier.  These pushbutton switches
flip between orange and black when either in or out but at this point I dont care about the color I just need two that work.   Anyone have some ideas ?

Bob
K6UJ
Logged
K0ZN
Member

Posts: 1553




Ignore
« Reply #1 on: October 29, 2012, 10:34:12 PM »

Alpha makes a big deal out of their product support.  That doesn't sound like first class customer support. Point this fact out to them.  I don't know who you talked to, but I would call again and ask to speak to Molly who is in charge of sales and ask her for help. The people in their purchasing area are a lot better equipped to find the switch than you are; they chase components and suppliers for a living! If nothing else, they should be able to find a suitable substitute.

73,  K0ZN
Logged
W9GB
Member

Posts: 2626




Ignore
« Reply #2 on: October 29, 2012, 10:52:31 PM »

Quote from: K0KN
Alpha makes a big deal out of their product support.  That doesn't sound like first class customer support.
Kyle -

Part is clearly listed, priced at $9 with photo on Replacement Parts listing for this 76A amplifier.
Very few people at Alpha today were working at Canon City, CO
when Dick Einhorn (ETO) was making this specific amplifier in 1970s and early 1980s.
==
Bob -

When I was restoring my former Elmer K9EWJ(sk) Alpha 76PA amplifier in 2005, I stopped by Alpha in Colorado, a few days after its sale/separation from the bankruptcy of Crosslink.
 I walked through 76A series spare parts shelves at that time, picking up odd parts I needed (minor, like the colored lamp boots behind meters) for repair/restoration.

At that time, I asked about those circa 1970s front panel switches.  (Mine were OK).
The switch assembly itself is available, BUT the button itself (colored flag change) was discontinued by switch mfg.  
I forgot the specific mfg. -- but Alpha had information.

As I remember, a plain button (no flag) was available from mfg. at that time, but Alpha was not stocking.

I referred another restorer to Alpha for the switch about 2 years ago.
he acquired through an eBay auction, and its switch assembly was burnt up, but buttons OK.

The SWITCH is LISTED on their web page (NOT front button), under Replacement Parts
Internal switch mechanism for the push buttons on the Alpha 76A, 78, 374A series of amplifiers.  $ 9.00
http://www.rfconcepts.com/Alpha-76-PA-C-PC?range=11%2C20%2C100

Switchcraft made a button assembly that was similar (used by Harris/Gates for broadcast & military)
http://www.switchcraft.com/productsummary.aspx?Parent=490

==
w9gb
« Last Edit: October 29, 2012, 11:20:15 PM by W9GB » Logged
W9GB
Member

Posts: 2626




Ignore
« Reply #3 on: October 30, 2012, 12:11:51 AM »

Here is the Alpha 76A Parts List
https://system.netsuite.com/core/media/media.nl?id=250&c=1065250&h=d6eab18cd4b7c693a21d&_xt=.pdf

http://www.rfconcepts.com/Alpha-76-PA-C-PC/SPX-X101-Switch-mechanism-for-the-76-78-374A
« Last Edit: October 30, 2012, 12:15:37 AM by W9GB » Logged
K6UJ
Member

Posts: 315




Ignore
« Reply #4 on: October 30, 2012, 01:00:46 PM »




Greg,
Thanks for the parts list and the info in your previous posting. Very much
appreciated !  I saw the switches on their webpage but assumed they were
for the bank of 4 metering switches in the middle of the front panel and huskier ones were needed for the ON/OFF.  On the parts list it indicates
8 are required, all the same, so yes RF Concepts has them all !   Finding the plastic caps is another story but I can live with it if they stay black and dont flip to orange when depressed as long as the switches are OK.  Its easy to see when the are depressed or not.  I just ordered a new switch plus some spares so I am in good shape now.   

tnx es 73,
Bob
K6UJ
Logged
W9GB
Member

Posts: 2626




Ignore
« Reply #5 on: October 30, 2012, 01:04:55 PM »

Bob -

That mechanical switch style (Flips color flags) was used in 1960s and 1970s high end radio/TV consoles as well as military gear.   IF Alpha/RF Concepts can get you mfg. and part numbers -- THEN you can watch surplus outlets.

C&K Switch (with flag cover) makes a switch that looks close, and may work in the Alpha.
Can not hurt to call them.
http://www.ck-components.com/f/pushbutton,10489,en.html

F-series Push Buttons
http://www.ck-components.com/13342/fpush_31aug10.pdf/

LOOK at Mechanical (flag) button style:  F07 (flip color flag, right size?)

C&K Components
15 Riverdale Avenue
Newton MA 02458
Tel: +617.969.3700
http://www.ck-components.com/switches-supplier.html
« Last Edit: October 30, 2012, 01:20:43 PM by W9GB » Logged
K6UJ
Member

Posts: 315




Ignore
« Reply #6 on: October 30, 2012, 02:04:46 PM »

Bob -

That mechanical switch style (Flips color flags) was used in 1960s and 1970s high end radio/TV consoles as well as military gear.   IF Alpha/RF Concepts can get you mfg. and part numbers -- THEN you can watch surplus outlets.

C&K Switch (with flag cover) makes a switch that looks close, and may work in the Alpha.
Can not hurt to call them.
http://www.ck-components.com/f/pushbutton,10489,en.html

F-series Push Buttons
http://www.ck-components.com/13342/fpush_31aug10.pdf/

LOOK at Mechanical (flag) button style:  F07 (flip color flag, right size?)

C&K Components
15 Riverdale Avenue
Newton MA 02458
Tel: +617.969.3700
http://www.ck-components.com/switches-supplier.html



The F07 caps are approx.  3/8" square.  The Alpha 76 caps are almost 7/8"
square.  They look the same except for the OS dimensions.  Looks like this is as close as the come.
However, the F02 caps like they are exact replacements for the 4 metering push buttons in the center of the front panel  Grin  So, narrowing down the field,supplier for all the switches and the 4 metering switch caps, now it s just the bigger caps.  This is looking much better than when I initially started,  I figured everything would be unavailable  Grin

Bob
K6UJ
Logged
W9GB
Member

Posts: 2626




Ignore
« Reply #7 on: October 30, 2012, 04:11:45 PM »

Bob -

It can't hurt to call C&K and make a query about the larger caps......
I have seen instances where the answer is, We are doing a custom production run for XYZ, we could add another 100 to it for you.

gb
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!