[R-390] image

[Bill Hawkins]

Static electricity? I thought the bulb was there for the transmitter
in your, or an adjacent, comm trailer. Dunno why people would remove
the bulb. It does nothing, nonlinear or otherwise, until it strikes
at around 90 volts.

Isn't shared ignorance wonderful?

Bill Hawkins


-----Original Message-----
From: r-390-bounces at mailman.qth.net
[mailto:r-390-bounces at mailman.qth.net] On Behalf Of Bob Camp
Sent: Monday, October 22, 2007 5:52 PM
To: Jim M.
Cc: R-390 List
Subject: Re: [R-390] image

Hi

If the neon bulb is glowing you have over 70 volts on the antenna
terminals. If that's the case, the radio is a bit overloaded ...

The neon bulb is mostly there to protect the input capacitors against
static induced voltages on a whip antenna.

Bob


On Oct 22, 2007, at 6:37 PM, Jim M. wrote:

> Both of my 390as have had that neon lamp removed by someone before I 
> got them.  It would be interesting to look at the lamp to see if it is

> glowing from the big BCST signal down the road.
>