[Elecraft] No Shaft Encoder Function

Hi All, I am having trouble getting the shaft encoder to function and, therefore, the frequency to change along with all other encoder functions. I posted this before and got no response. So I thought I'd try again. VY 73, Bill NA7Y ___ Elecraft mai

[Elecraft] Shaft Encoder

I am working on two K2's which both have a problem. No matter how and how hard you turn the front panel knob, the display almost moves a couple Hertz, then settles right back to where you started. I have no clue how fix this anomaly. I'd welcome any insight the group can offer. Thanks, Bill

[Elecraft] Problems

Hi All, My K2 project has two snags. The first is the optical encoder. When turning the encoder shaft, it appears to be battling with "Lock" to see who will control the frequency. Lock always wins, although if you turn fast enough, you can get one or two changes in the lsb. The remainder of

[Elecraft] Characteristic Impedances

Gang- Can anyone tell me the design values for the termination impedances for both the bandpass and lowpass circuits. I'd be ever so happy if it is 50 Ohms. Thanks, Bill NA7Y ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a su

[Elecraft] Mic's

Folks, I have a Kenwood MC60 I intend to use with my K2 when it gets to that point. Have any others used that mic in the K2 and with what success? Thanks, Bill NA7Y ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber t

[Elecraft] 10 Meter power

Thanks to Don and David for their responses. Once I spread the turns on L21 and L22 I noted a couple of dB of gain. Then I got really serious with my measurements using my 3585. The '85 said something just over 40 dBm - 10 watts. So I quit fiddling and am ready to work on the K2 auto-tuner.

[Elecraft] Low Power on 10 Meters

Folks, I'm having a real struggle getting 6 to 7 WATTS on 28 Mhz while all other all other bands come up with a number well in excess of 10 Watts. Has anyone experienced this problem and was able to solve it? I'm suspecting low pass filters that are not coordinated to the 10 Meters Caps, if yo

[Elecraft] Inductive Metalfilm Resistors

Back when I was gainfully employed, we ran into a serious problem with our metal film resistors. The film was etched in a spiral like a barber pole, resulting in a beautiful inductor in series with the resistor as measured at low frequency (or not at all). We had to change our tech description

[Elecraft] Tracking Generator

Hi All, I was extremely fortunate when I became one of the design team for the HP 3585A/B back in 1974. The spectrum analyzer has a typical dynamic range (MDS at ARRL) of 100 dBm on screen. The HP 3585B also has a tracking generator! You can sweep the filters and other circuits and their fre

[Elecraft] BFO Woes

Hi Group, I have been struggling for a month to figure why I have no BFO at TP2. Also, Q24 voltages measure zero all around. The gate has a very small (10 mV peak) distorted version of the nice sine wave on U11's nice 1V peak sinewave. I have traced all the way back to Control Board U8 pin 2

[Elecraft] Solvent

Hi Folks, I'd like to know from the collective wisdom what solvent may be used on Elecraft PC assemblies to remove some residual flux and flux smears. It seems to me that a solvent that wouldn't harm boards and components was isopropyl alcohol (rubbing alcohol) in the old days. What do you Ele

[Elecraft] Tech Scope

I have a Tech 465 that no longer works for reasons unknown All I can say is that beam finder doesn't put a dot on the screen from either channel. I really would like to find someone who could fix it for a reasonable fee. Do we have someone on the reflector who fixes scopes or can lead me to s

[Elecraft] Radio Design

Hi Mike, When I was a younger old man, Ulrich Rhode (Rhode and Schwartz Instruments) and a collaborator wrote "Communications Receivers: DPS, Software Radios, and Design, 3rd Edition". I would recommend this book most highly for an EE. It gets highly technical in spots. Good luck, Bill NA7Y

[Elecraft] test

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[Elecraft] Text on design

Hi Doug, When I was a younger old man, Ulrich Rhode (Rhode and Schwartz Instruments) and a collaborator wrote "Communications Receivers: DPS, Software Radios, and Design, 3rd Edition". I would recommend this book most highly for an EE. It gets highly technical in spots. Good luck, Bill NA7Y

Fw: [Elecraft] Missing designation?

;t recall the moniker used to name them, but I'm building a second K2 and recall pondering the same question a few years ago when K2 S/N 1599 was underway. I think you may find that C162 is installed on the bottom side of the RF board. Check it out. Steve Banks K0PQ -Original

[Elecraft] Missing designation?

Hi All, On my RF board there are holes for a capacitor, but no designation. The holes are right next to C159 and the Q22 heat sink. Anyone know what capacitor that is? I am missing holes for C162 for instance. This is probably a known issue, but I still have a lot to learn! Thanks, Bill NA

[Elecraft] Turn-On Help

My turn-on tests are all fixed now that I used my Hakko to get U3 in the proper orientation. I'm not supposed to make mistakes like that Thanks, Bill NA7Y ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post

[Elecraft] Need Help

Hi Gang, The Old Guy has run into an "I don't know how to fix it" situation. I made it to the first step on page 43 where the machine turns on, says "Elecraft" for a bit then displays 7100.00c. That's it. There is no response to key presses and neither the bar graph S meter nor the LCD dis

[Elecraft] C44

Hi Folks, I'm back from a two year bout with various health issues. During my absence, something changed on the control board leaving C44 grounded on one end and the other end is connected to nothing and no part to put in the holes. I apologize if this was discussed before, and it's great to b