[Amps] HL-2K

[Robert Groh]

Not sure but someone else may have answered your reply but, if not, here is my reply. 

First, you shouldn't confuse the green wire with a neutral.  It is not a neutral, it is a 'grounding' conductor - that is, it is intended to ground the metal parts of the electrical appliance (e.g. your HL-1K).  The neutral wire is usually the white wire and it is usually connected to the unswitched side of the load.  The hot wires (typically black for 120 VAC or black and red for 240 VAC) are the wires normally switched.  

I was able to locate a schematic for the HL-1K amplifier on the net (nice amp, by the way!) and I would hook it up this way:
120 VAC 3-wire    
    Black   120 VAC input switched input (check schematic)
    White   Neutral  - other 120 VAC input
    Green   Ground - connect direct to chassis
220 VAC - 4 wire
     Black   220 VAC input 
     Red      Other 220 VAC input point
     White    Neutral (no connection - any internal 120 VAC loads (e.g. fan) are provided by HL-1K transformer)
      Green   Ground  - connect directly to chassis

So there you - my best guess

73
Bob Groh, WA2CKY





________________________________
From: Kevin LaHaie <klahaie at centricata.com>
To: Robert Groh <rgroh at swbell.net>
Cc: MIKE DURKIN <patriot121 at msn.com>; amps at contesting.com
Sent: Friday, August 28, 2009 12:48:11 AM
Subject: Re: [Amps] HL-2K

I have an HL-1K from THP, and the power cord is only 2 conductors.  The manual gives wiring schemes for 100v, 110v, 117/120v, 200v,220v, and 234/240v.

Only the 2 leads are illustrated (obviously a hot / neutral for 100-120v, 2 hots for 240v).  It shows no ground OR neutral connections to the wiring terminals.

So I am also curious to see what is recommended to wire one of these early THP amps for single phase 240v if putting the green (neutral) wire to the chassis is a no-no. (obviously I had planned to put a 3 wire cord on this amp, perhaps now it will need a 4 wire?)

73 Kevin K7ZS

Robert Groh wrote:
> No, no, never connect the neutral to any ground (e.g. the case, the grounding conductor in the 4-wire line, etc)!
> 
> That is a violation of the electrical code and dangerous on top of it.  I can't tell you what use the HL-2K uses - hopefully someone can give the answer on what you do with the neutral connection.  The neutral (in combination with 1 of the hot wires) is used to give you a 120VAC power connection (for relays, small power supplies, fans, whatever).
> 
> 73
> Bob, WA2CKY
> 
>