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JT65 on the BitX

Ed, K5TX
 

Hello -

I am interested in using a BitX on 40 meter JT65. has anyone tried it? How well does it work?

Thanks, Ed, K5TX
 

I have done a few modes to get usb and i was monitoring last night and was able to transmit 20+ watts but i haven't hooked up my digibox yet i will put it together tonight


On Fri, Mar 31, 2017 at 9:55 PM, Ed, K5TX <k5txradio@...> wrote:

Hello -

I am interested in using a BitX on 40 meter JT65. has anyone tried it? How well does it work?

Thanks, Ed, K5TX
Simon Rumble
 

What mods are required to get USB (Upper Sideband) to work? I've seen some pull requests, so is it software only?


On Sat, 1 Apr 2017 at 13:02 Steve Greer <km4ous@...> wrote:
I have done a few modes to get usb and i was monitoring last night and was able to transmit 20+ watts but i haven't hooked up my digibox yet i will put it together tonight


On Fri, Mar 31, 2017 at 9:55 PM, Ed, K5TX <k5txradio@...> wrote:

Hello -

I am interested in using a BitX on 40 meter JT65. has anyone tried it? How well does it work?

Thanks, Ed, K5TX
 

yes just software

On Sat, Apr 1, 2017 at 2:28 AM, Simon Rumble <simon@...> wrote:
What mods are required to get USB (Upper Sideband) to work? I've seen some pull requests, so is it software only?

On Sat, 1 Apr 2017 at 13:02 Steve Greer <km4ous@...> wrote:
I have done a few modes to get usb and i was monitoring last night and was able to transmit 20+ watts but i haven't hooked up my digibox yet i will put it together tonight


On Fri, Mar 31, 2017 at 9:55 PM, Ed, K5TX <k5txradio@...> wrote:

Hello -

I am interested in using a BitX on 40 meter JT65. has anyone tried it? How well does it work?

Thanks, Ed, K5TX
Simon Rumble
 

So what software you using?


On Sat., 1 Apr. 2017, 18:57 Steve Greer, <km4ous@...> wrote:
yes just software

On Sat, Apr 1, 2017 at 2:28 AM, Simon Rumble <simon@...> wrote:
What mods are required to get USB (Upper Sideband) to work? I've seen some pull requests, so is it software only?

On Sat, 1 Apr 2017 at 13:02 Steve Greer <km4ous@...> wrote:
I have done a few modes to get usb and i was monitoring last night and was able to transmit 20+ watts but i haven't hooked up my digibox yet i will put it together tonight


On Fri, Mar 31, 2017 at 9:55 PM, Ed, K5TX <k5txradio@...> wrote:

Hello -

I am interested in using a BitX on 40 meter JT65. has anyone tried it? How well does it work?

Thanks, Ed, K5TX
 

I built my BitX40 for USB so I could run digital modes and I use it a lot for JT65. The only mod I made was to replace the L5 jumper near the BFO with a inductor. I found out what value is used here in the USB BITX20. For me it was 41 turns on a T37-6 core which I happened to have on hand. I then had to retune my VFO to read on frequency. I haven't found an satisfactory way to switch back and forth to SSB mode but so far I haven't tried very hard.

I use 12 volts and get about 7W and the stock heatsink runs cool with the digital duty cycles. That power is a bit lower than most people seem to use and I typically get a lower report than I give. I already have several QSLs beyond 10,000 miles though, so I'm still having fun.?

--Frank KK6WUU
Simon Rumble
 

Good info Frank. How are you connecting audio cables and PTT to the computer?


On Wed, 5 Apr 2017 at 06:20 Frank Cox <frank.l.cox@...> wrote:

I built my BitX40 for USB so I could run digital modes and I use it a lot for JT65. The only mod I made was to replace the L5 jumper near the BFO with a inductor. I found out what value is used here in the USB BITX20. For me it was 41 turns on a T37-6 core which I happened to have on hand. I then had to retune my VFO to read on frequency. I haven't found an satisfactory way to switch back and forth to SSB mode but so far I haven't tried very hard.

I use 12 volts and get about 7W and the stock heatsink runs cool with the digital duty cycles. That power is a bit lower than most people seem to use and I typically get a lower report than I give. I already have several QSLs beyond 10,000 miles though, so I'm still having fun.?

--Frank KK6WUU
 

I used a "SignaLink USB" interface. This, like other interfaces, gives me a external sound card in a little box that also includes transformer isolation for the audio lines and a relay for PTT.?

On my BITX I added a jack with mic speaker and ptt lines to it. Don't forget to put a cap in series with the mic line to block dc. I used the speaker output after the volume control but it would be slicker to use a fixed "line" level instead.?
Ed, K5TX
 

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Thanks for the input. That is a great help.

I wanted to know if JT65 is possible with the BITX and your answers verified that it is.

I am currently using WSJT-X software with a home made interface with an old ?KenwoodTS-530s.

It works well, but does drift more that I would like.

Thanks again,

?

Ed, K5TX

?

Sent from for Windows 10

?

From: Ed, K5TX
Sent: Friday, March 31, 2017 8:55 PM
To: [email protected]
Subject: [BITX20] JT65 on the BitX

?

Hello -

I am interested in using a BitX on 40 meter JT65. has anyone tried it? How well does it work?

Thanks, Ed, K5TX

?

70667CC231FA4CF49472326690D4F0EC.png

College Professor Simon Thompson
 

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What size of capacitor should I use in the mic line to block dc? And does the capacitor go across the mic lines, or just in line with the positive mic lead?

Sent from my iPad

On Apr 5, 2017, at 3:55 PM, Ed, K5TX <k5txradio@...> wrote:

Thanks for the input. That is a great help.

I wanted to know if JT65 is possible with the BITX and your answers verified that it is.

I am currently using WSJT-X software with a home made interface with an old ?KenwoodTS-530s.

It works well, but does drift more that I would like.

Thanks again,

?

Ed, K5TX

?

Sent from for Windows 10

?

From: Ed, K5TX
Sent: Friday, March 31, 2017 8:55 PM
To: [email protected]
Subject: [BITX20] JT65 on the BitX

?

Hello -

I am interested in using a BitX on 40 meter JT65. has anyone tried it? How well does it work?

Thanks, Ed, K5TX

?

<70667CC231FA4CF49472326690D4F0EC.png>
 

I believe I've read 1000uF electrolytic a few times in regards to using a dynamic mic. Same with line-in. 6V rated or higher is best. You want a capacitor rated higher than the voltage in the circuit. And I think that's 3 volts. I bet it would be easy to test with a DMM when pressing PTT button. Put it in-line observing polarity. Positive input to positive side of cap. Be sure you are on upper sideband if you are going to do digital modes.
 

A 1uF of 16V or more will do. the +ve lead of capacitor to the circuit and -ve to external audio input.

73 Raj vu2zap

At 06/04/2017, you wrote:
What size of capacitor should I use in the mic line to block dc? And does the capacitor go across the mic lines, or just in line with the positive mic lead?

Sent from my iPad

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