[Heathkit] [Glowbugs] Heath SB-110 or Swan-250

[Glen Zook]

The easiest way is to lift the lid and look for V-9.  On the SB-110 this tube is mounted on the chassis and on the SB-110A it is located on the carrier circuit board.


Also, when running the SB-110A from any of the HP-23 series power supplies, make sure and use the 250-volt low B+ setting and NOT the 300-volt setting.  The unit will "lock up" in transmit when going to the tune position, when the PTT is keyed, and so forth if the 300-volt setting is used.

 

Glen, K9STH 

Website:  http://k9sth.net


________________________________
From: Tom WA9WSJ <wa9wsj at yahoo.com>
To: Glen Zook <gzook at yahoo.com>; Heathkit <heathkit at mailman.qth.net> 
Sent: Tuesday, September 19, 2017 7:38 PM
Subject: Re: [Heathkit] [Glowbugs] Heath SB-110 or Swan-250



Hello Glen,

How can you tell which model you really have? Is there something relatively easy to look for which determines the 110 versus the 110A?

thanks,

Tom