[Hallicrafters] Halli 40A...an extra jack-in-the-back?

[John Page]

Could also be for a speaker. A lot of speakers now have RCA plugs and I have 
seen quiet a few boatanchors have this added jack. John

John Page K4KWM
Hollow State since 1953
(ex W8PKU,N8BLB,NA8O)




>From: "Ian" <ianwebb5 at comcast.net>
>To: <Zengmeiste at aol.com>, <hallicrafters at mailman.qth.net>
>Subject: RE: [Hallicrafters] Halli 40A...an extra jack-in-the-back?
>Date: Sun, 4 Dec 2005 07:35:54 -0800
>
>Terry,
>
>Check what's attached to the chassis side of the connector and see where it
>goes.  A bit of simple circuit tracing should answer your question quickly.
>
>If you find a short piece of small shielded wire attached to a capacitor to
>an IF area connection it's likely for a Q-Multiplier.  That was a common
>addition those days for low end receivers without a way of narrowing the
>bandpass or getting rid of an annoying heterodyne.
>
>And if it jumps right to the antenna terminals then it's for an antenna
>which also wasn't uncommon.
>
>Ian, K6SDE
>
>-----Original Message-----
>From: hallicrafters-bounces at mailman.qth.net
>[mailto:hallicrafters-bounces at mailman.qth.net] On Behalf Of
>Zengmeiste at aol.com
>Sent: Saturday, December 03, 2005 10:13 PM
>To: hallicrafters at mailman.qth.net
>Subject: [Hallicrafters] Halli 40A...an extra jack-in-the-back?
>
>   So the 40A works fairly well, but reception is not great, due to huge 
>COM
>ED xformers just outside the window and other (DSL-related?) interference,
>darn.
>
>    I noticed an RCA jack on the back, just above the antenna lugs, doesn't
>look original and the manual mentions it not.  I've heard  some Halli's 
>were
>
>modified to use an outboard device for improving reception...or   could it
>be a
>PHONO input?! I'd rather not blow anything up but I'm tempted to uhh plug a
>cord in and see what happens..
>   Thought? Thanks and 73s, Terry
>
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