Re: The TR-4 has 3 semiconductors - one is a neon driver
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Well..... there never really was a TR-4B labeled as such, at least not that I am aware of.? The NE2 shows up in TR-4 #27,000, which had its debut in early to mid-1967 per Ron's serial number database.? The B-line came out early in 1968, again per Ron's database.? (There is another error there with the 1st T-4XB listed).? So Gary is correct in that the TR-4 with the neon lamp is tied to B-line production.? Maybe a TR-4"B"?
There is a labeled TR-44B though - the T-4B/R-4B communications station.
I'll duck any flames now......
73 Peter
TR-4B?
Thanks, Barry - N4BUQ
From: "Gary WB6OGD via " <winbladgary=[email protected]>
To: "DRAKE-RADIO" <[email protected]>
Sent: Friday, January 24, 2025 4:16:58 PM
Subject: Re: [DRAKE-RADIO] The TR-4 has 3 semiconductors - one is a neon driver
David, And you must be looking at a TR-4B not a TR-4.? The B is the only version with the neon. The neon indicates which PTO is active when using the external RV-4B.
73, Gary WB6OGD
Just checked the schematic ...
Drives a NE2-E.
Thanks.
On 1/24/25 16:03, Dave W7GZ via wrote:
> Would it be the little orange light under the VFO pointer on the dial?
> Dave
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