[Amps] Heathkit SB-1000 Arcing

[Han Higasa]

hi gents. I also have one.

If the ark occur at the stand-by state (not TXing) you should
check HV+ as well as the tube itself.

The tube can cause ark inside especially when it is NOS.
If it is the case you can see typically pink ark inside the tube.

A plastic insulator between the chassis and the base of plate RFC
can break into pieces after long operation.
I have replaced it to 25 x 25 x 3mm teflon sheet.

Also, I have experienced a splitted lower RFC brass-band.
It can cause a short-state to chassis ground. It is easy to change
the band but I have soldered another piece of copper sheet to
chink it up.

My SB-1000 may cause ark around the band switch when
feeding high-SWR load but almost stable.

GL, de Han JE1BMJ

----- Original Message ----- 
From: "Thomas F Giella NZ4O" <nz4o at tampabay.rr.com>
To: "amps @ COL" <amps at contesting.com>
Sent: Monday, November 26, 2012 9:39 AM
Subject: [Amps] Heathkit SB-1000 Arcing


> Thanks much for the responses. I checked everything suggested but no joy.
>
> I even resoldered all connections. The capacitors were put in by a 
> previous owner and are supposed to be new. They checked out okay.
>
> The arcing sound is definitely coming from the power supply area but even 
> in the dark I can't see the flash of light, bizarre. It's time to sell the 
> SB-1000 at a bargain price.
>
>
> 73 & GUD DX,
> Thomas F. Giella NZ4O
> Lakeland, FL, USA
> nz4o at tampabay.rr.com
>
> NZ4O Amateur Radio & SWL Autobiography: http://www.nz4o.com
> NZ4O MF/HF/6M Radiowave Propagation Forecast: http://www.solarcycle24.org
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