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VK6BE > HISTRY 09.11.07 00:29l 28 Lines 1331 Bytes #999 (0) @ WW
BID : BA1406VK6BE
Read: ON4CBL GUEST
Subj: Re: Re: VK6BE > centre tap frog
Path: ON0AR<DB0RES<IK2XDE<I0TVL<F6CDD<F6BVP<VK2TV
Sent: 071108/2320Z @:VK2TV.#MNC.NSW.AUS.OC #:23620 [Kempsey, QF68JX] $:BA1406VK
From: VK6BE@VK2TV.#MNC.NSW.AUS.OC
To : HISTRY@WW
Oh dear, more explaining!! Two chasses, one with rig and one with power
supply switching the power supply by earthing centre tap on the
transformer. OK. Turn off rig (opening centre tap). Now put one hand on
one chassis and the other on the other. BLAM! You got it?
I got caught like that too when servicing an old radio once 50 years ago.
The rx had some diabolical method of providing 250 VDC to the radio using
two chassis, one for the receiver and one for the radio. Vibrator supply
using a car battery. Get it? I think that radio came from Holland. It
also had a valve which had the anode on top. Radio servicemen used to
check the audio stages by touching the cap on top of the valve first in
the audio stages hoping to hear a healthy blurp!! from the speaker. In
this case if you had the other hand on the chassis you got more than you
bargained for much to the amusement of your confederate in the shop.
Bob VK6BE.
Now I hit "reply" to send this on its way. NO typing address needed or
done.The address should be correct with no interference from me at this
end!
>
> I don't know how you got bit from switching the HV center tap unless it
> was a bit of froggie sabotage or maybe fat fingers. I suspect the latter
> but undoubtedly you'll blame the frogs. (;->)
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