[ARC5] interesting

[jeepp]

Ok, I stand corrected.... the early version had 60 Hz.  The Y was 400 to 1000 Hz?K3HVG


Sent from my Verizon 4G LTE smartphone

-------- Original message --------
From: Robert  Eleazer <releazer at earthlink.net> 
Date: 2/24/18  07:28  (GMT-05:00) 
To: arc5 at mailman.qth.net 
Subject: Re: [ARC5] interesting 


The original APR-4 came out in WWII and used octal
tube technology for the base IF unit.  The APR-4Y was the Korean War
version and used miniature tubes; the schematic I have is dated 1950.  The
APR-4 would run on 60 cycle as well as 400 HZ but the APR-4Y was 400 HZ
only.
 
I have an APR-4Y in which someone removed the power
supply entirely.  One day when I'm not tied up fixing hurricane damage I
might even get around to building a power supply for it.
 
Wayne
WB5WSV 


	
        
		Virus-free. www.avg.com
		
	
 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/arc5/attachments/20180224/d5daaea8/attachment-0001.html>