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And if you have ever really adjusted the null, you would know that is a VERY fine adjustment, even with the reduction drive! 73, Gary WB6OGD

The carrier null is so sharp it has to be a multi turn pot. Rob, NC0B

When I initially checked the carrier balance awhile back it looked like this pot (R21) was set correctly. Today, I attempted to do the filter match alignment (Sec 5.9 in the instruction manual). The

Yes. It was installed in a L7 amplifier to prevent it from being driven on 10-11 meters. Not very useful I would say.... Most get tossed in the trash.. Which they should be. 73, Jim W7RY -- Thanks and

Gregg, If you are going to use with the T4XC, align it with it connected to the transmitter. The injection and antenna cables need to be drake spec cables. That does make a big difference overall. My

Thanks - I do also have a Shure 450 so I may use it instead and save the D-104 for another project. 73's Don W. KD4APP ________________________________ Sent: Tuesday, March 28, 2023 10:58 AM To:

I bought a L7 back then new and then converted it to be an export model.? You had to change one input silver mica, re-tune it, remove a set screw so the band switch would move to the 10 meter

Hi Steve, I have a pretty old, but original inj cable. Do the characteristics change over time? I have been aligning without the connections. thanks, gregg

I was wondering the same thing, Peter. The parts may be of some use in other applications. Steve Wedge, W1ES/4 Time flies like an arrow. Fruit flies like a banana. Sent with [Proton

Thousands have used the D-104 with all manner of Drake tube gear. Check to see whether or not the mic has a built-in amp, as that will be a factor in how you set it up. 73, Steve Wedge, W1ES/4 Time

Jim: You won't find that low pass filter board in an "Export" (like Canada) model. It was installed in the US models to inhibit 10m operation in a fruitless attempt by the FCC to stop CB-ers from

What was it used for...to inhibit? amplifying > 23 mhz ??

Probably thousands of hams have used this mic with this transceiver.? The other popular mic used is/was the Shure 444! Lee, w0vt

Arnie, The front end alignment portion would apply to any of the R-4 line. Rob, NC0B

I am restoring a TR-3 and have already restored the AC-3 and purchased a nice MS-4 - I also purchased a D-104 microphone at a local hamfest recently and would like to use it with the TR-3 - has anyone

Arnie, I have used this method for quite some time, with all lines, and it is definitely LOT less hassle than swamping the premixer. The tuned band circuits are pretty much identical across the

The ones at AES look identical to the ones I have seen in some of my Collins knobs. It may be time to experiment and see if they'd work with the Drake knobs that have no setscrew. Many times, those

Rob: Would the procedures set forth in that document also be applicable to a R4b / T4xc combo? Tnc es 73 de Arnie W8DU

Man, that's an obscure niche product line. Great find! John [email protected]> wrote:

KNOB SPRINGS https://www.tubesandmore.com/products/knob-springs-half-moon-d-shafts LECTRA Fasteners (Arvada, CO) Manufacturer of D, D with barbs and double-D inserts used with control knobs