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I suppose you mean the D-104-C? In catalog 197 it is listed only 3 dB lower than the crystal version. Interestingly they don't specifically say which is in the T-UP9-D104 "Silver Eagle". That suggests

Jim's 470K resistor solution is a good one where the transceiver limits audio response to what we're normally accustomed to for SSB. I use a 470K resistor in the base of a D104 when using my Drake TR5

Astatic made another model the C-104 with a ceramic element. Very similar except the output is about 10db lower. This is for the element alone. If there is an amplifier the output levels are probably

Didn't say it did. - Jerry, KF6VB

I don't know of anyone who has needed to replace them but it should be possible to find or build a suitable substitute. You should be able to test them by watching the voltage swings at pins 1 and 8

Already covered. Twice. Thank you for your comments. 73 -Jim NU0C "Omni" <selcor@...> wrote:

That does not change what I wrote. 73 -Jim NU0C "jerry-KF6VB" <jerry@...> wrote: -- 73 -Jim NU0C

Encoders like this have two outputs.? If one has a broken wire or bad connection it will only change the frequency in one direction.? SInce yours seems intermittant, check the continuity of the

It appears that the Optical Interrupters are the problem. I took it completely apart and cleaned the sensors as best I could. I swapped sides for the 2 sensors so will see what happens. Does anyone

*** My homebrew amp is just a source follower. It has no voltage gain. Its only purpose is to present a high impedance to the element. I see that the "silver eagle" had a 26dB amp in the base. I

That is not a problem. J-104 controls which way the frequency goes with relation to knob rotation. When all else fails read the manual. The setting of J-104 is detailed in Section 2-3 on page 2-2 of

My "secret" is to do away with the amplifier and replace it with a series 470K resistor. This is actually an old-timer's trick to mellow out the frequency response of the D-104 head. The amplifier is

That is correct. Rob, NC0B

Mark, Thinking about this more... Forget that last analysis, I think your carrier oscillator is fine (and you indicate you did the manual alignments). Your audio on the panadapter does look good on

I have a D-104 that I use with various radios. I always get good reports. The secret? It has a JFET source follower in the base. The JFET presents an extremely high impedance to the Rochelle Salts

Mark, Ah ha...? I just looked at? the original post. I think you have a problem with your carrier oscillator alignment. When you look at your signal on the new rig with the panadapter... When you

I just sent a rather long note. Try the attenuator pad first, the mic may be overloading the mic preamp. However, the mic has a characteristic pinched sound, to my ears metallic. Look at the frequency

A Note: This data sheet shows an attenuator pad, if you don't want to by-pass the amplifier I strongly suggest you use this pad. The white wire referred to is inside the base. The D-104 has been a

Yep. It’s in the manual. The two grounds get tied together at the connector. Steve Wedge, W1ES/4 Time flies like an arrow. Fruit flies like a banana. Sent from [Proton

Hi Richard, Yes, this is an amplified version and I wanted to try it at a low setting as my audio reports have come back as pinchy and narrow. Bill N1WL ?? William Losefsky? ?????????