Hi agn Adrian .....quote from Wireless for the Warrior
"Wireless Set No. 7 was a mobile transmitter/receiver developed in 1935.
Use: communication between tanks. Frequency range 1.875-5MHz. MO/crystal
control. RF output 5W. R/T and MCW. Range 3-5 miles. Unusual shape to fit in
the bulge of a tank. Only a limited number were produced. Replaced by No. 9
set."
Alan
G3NYK
----- Original Message -----
From: "Adrian Godwin" <[email protected]>
To: "Discussion of precise time and frequency measurement"
<[email protected]>
Sent: Saturday, November 26, 2016 12:40 PM
Subject: Re: [time-nuts] Vintage Quartz Crystal Manufacturing
I bought some old crystals on ebay :
http://www.ebay.co.uk/itm/122225114483
Is anyone familiar with this style ? I don't think the quartz is visible
in
the glass section : I imagine that's just an insulator. I think the quartz
is under a brass disc, with a sping to hold the disc down visible through
the glass.
Does anyone know what the reference marked on them "w'less sets No 7"
refers to ?
On Mon, Sep 26, 2016 at 6:50 AM, Mark Sims <[email protected]> wrote:
Can you say "Mr Rogers' Neighborhood?" I knew you could...
He (along with creepy Mr McFeelie) always ran segments on how some item
was made. Geared towards pre-schoolers, but always worth watching.
---------------------
Compare the Science channel's new "How Do They Do It" to the older "How
It's Made"
shows.
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