The KEY OUT jack GROUNDS the center pin, whereas a shorted phono plug simply completes the DC relay circuit between shield and center (without grounding it). That's probably why it doesn't work. 73, B

Among other tricks, the "Serial Box" (S-BOX or S-BOX-USB) offers a plug and play solution compatible with RemoteHams software (or simple Windows batch files) to power a K3 ON and OFF remotely. With th

If you are using a K3S or any FTDI-based USB-to-Serial adapter, please follow the important advice documented here to prevent the adapter from generating spurious signals on the DTR and RTS pins: http

Play M1 (tap M1): SWT21; Play M2 (tap M2): SWT31; Play M3 (tap M3): SWT35; Play M4 (tap M4): SWT39; Swap banks (hold REC): SWH37; (Toggles playback between KDVR3 message Bank 1 and KDVR3 message Bank

If you're keen on using the IC-7610, then you should appreciate that the KPA1500 understands "Icom CI-V" (exact frequency), whereas the KAT500 and KPA500 do not. This means the KPA1500 internal tuner

For those who would just like a plug and play solution, I designed the S-BOX (Serial Box) for just this purpose. It's like my Y-BOX, but splits the 9-pin K3 Serial port (or K3S RJ45 Serial Port pigtai

Looks like my embedded images may have been stripped by the Groups.IO reflector. You can see the before/after here in this Google shared photo album: https://photos.app.goo.gl/ruccJEj27QuySzmb7 73, Bo

Wolf, If you don't hear any noise in the receiver, or see the S-meter go up on your K3 at the same time that the noise floor appears to rise on your P3, then it's probably just leakage into the P3 its

In the K3S, you must first set CONFIG:RS232 to USB, then power cycle the radio. Then look in Windows Device Manager (Start, Run, devmgmt.msc) to determine the correct FTDI serial port. See also this i

Repeating, it is now at http://ftp.elecraft.com/K3S/K3S_comparison1.pdf 73, Bob, N6TV

Did it work via AFSK (speaker audio from sound card wired to LINE IN) or FSK (keying circuit on Pin 1 of ACC port)? Assuming these are all FTDI USB-to-Serial devices, MMTTY cannot directly open any of

Lou, Yes, that's right, if CONFIG:TX DLY is set too high, the internal keyer will sound fine (because it compensates), but external keying will sound too light. Of course if you're using CW QRQ mode b

In the K3 CONFIG menu, check TX DLY. Unless you're using a linear amplifier with slow relays, set it to the minimum value, nor 008. This will truncate the leading element (semi break-in), or every ele

As far as I know, it is not possible (at present) to program PF1 to toggle the minimum fan speed between two values. But it is relatively easy to use two Windows batch files on a PC, with a single cli

OmniRig and typical logging software polls the K3 more than one per second. I think 200 ms polling is about as fast as you can go on a K3 or K3S, but please read on. With CONFIG:RS232 = USB, only the

Reminder, S-BOX and Y-BOX order forms submitted by midnight Monday (Pacific Time) will receive free domestic shipping, or discounted international shipping. Orders for both may be combined into a sing

Do you have the SubRx (KRX3) installed? It's easy for the SubRx to pop out of the connector near the left rear of the K3. Take off the top cover and try to reseat it. If the SubRx gets dislodged from

Sorry the server certificate just expired. The server owner has been contacted. It is safe to proceed to the web site. 73, Bob, N6TV

All S-BOX and Y-BOX orders received by midnight Pacific Time on Labor Day ( 2018-09-04 07:00 UTC) will qualify for free domestic shipping via USPS Priority Mail. Limit: 4 boxes per customer and as man

Elecraft K3 MCU version 5.33 added the new "USB SAFE" option as a default (CONFIG:PTT-KEY, Tap '1'), which prevents unexpected transmissions when you restart Windows or reconnect an FTDI adapter. This