[Heathkit] Heathkit SB600

[Kenneth G. Gordon]

> I am looking for specifications of the SB-600
> 
> I have one and it has penciled on the back +1000, +275, and -110 but
> beyond that I know nothing, no specifications for the pin out or the
> amperages.  I want to use it on a Collins S-Line and am wondering if
> it has the guts for the job.

The SB-600 is simply the speaker and cabinet. If you mean the 
power-supply which is sometime mounted inside the SB-600, we 
would need to know the model number. Usually it is an HP-23. The 
HP-23 has ~+750 under load, +275 or +300 (if there is a switch on 
the powersupply for that: some didn't have it), and ~-110 for bias. It 
also outputs 12.6 VAC for filaments.

The HP-23 was designed for the Heathkit SB-100/101/102 and 
HW-100/101 series of transceivers. My understanding is that one 
reason the prices of HP-23s stay up pretty high is that they work 
well with the Collins KWM-2/2A and DO provide plenty enough 
voltage and current for that purpose.

Ken Gordon W7EKB