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Is the solid state VFO and buffer in the TR-4 more stable than the TR-3 tube VFO, or was it changed to save a little space, heat, and power? Thanks, David KD4E

One of the mysteries, I guess. There were some developments over their time that can only be guessed at — like my “TR-34” (wish I’d kept it) that was a TR-3 that was converted so well that it

Thank You Mike for your detailed reply. This is the detail I was looking for to prevent any damage to the equipment. It is quite different from the way the old connector was wired. As the D104 was

The BLUE and RED wires make up the "PTT" switch. The "RED" wire connects to the PL68 "TIP". T4XC PTT relay B+ is on the microphone socket's "TIP". The "WHITE" wire connects to the PL-68 "RING".

It would still work even if you didn't glue it back together.? ?There is no electrical continuity to begin with.

I don't know why I didn't think about gluing back together. Lord knows I've glued a bunch of toroids when making end fed half wave antennas.

Winter Field Day: Jan 25 1600Z through Jan 26 2159Z Rules posted on the WFD site 73 Jay W6CJ

Yeah, guess I remembered wrong. Same upgrades as the 4B separates line though (new main tuning knob, neon, black lettering above the belt line, etc.). Just not officially called TR-4B.. wonder why?

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.

TR-4B? Thanks, Barry - N4BUQ

I was looking at this manual: https://manualmachine.com/drake/tr4/7620914-user-manual/

Hi I am in the process of wiring the Terminal to my Astatic D104 Amplified version ( Silver Eagle ). I bought a PL68 connector to fit the Drake T-4XC. On the older larger incorrect connector someone

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 [email protected]>

Just checked the schematic ... Drives a NE2-E. Thanks.

Hi all; Came across what appears to be a first for me in years of messing about with Drake gear....a factory error! I was working on re-capping an R-4C, #19,247, so a fairly early one, though of

Would it be the little orange light under the VFO pointer on the dial? Dave

I was just looking at the TR-4 manual. It shows three semiconductors: VFO VFO Buffer Neon Buffer. Since it's an analog display - what 'neon' is the 2N3877 driving, please? Thanks, David KD4E

I have a T4XB and R4C connected for transceive mode with the R4C, utilizing a third party digital dial connected to the INJ cable with a "Y" connector, controlling the frequency. In this setup, with

Ditto the recommendation for cyanoacrylate cement. I've used it on toroids that I wanted to get around a piece of coax without removing the connector. - Jerry, KF6VB

Mark: They aren't going anywhere! Keep me posted and thanks for your super write-ups on the 4310 repair. 73 Peter VE7PS [email protected]> wrote: