¿ªÔÆÌåÓý

ctrl + shift + ? for shortcuts
© 2025 Groups.io
Date
R-4B AGC Issues, Part Trois
I've completed sorting through hundreds of CMOS chips (the old Motorola 4000-series) and fixed my extra Trac TE144 keyer. It was good to actually fix something, for a change. BTW, if any of you need
By Steve Wedge, W1ES/4 · #75364 ·
Re: CW Operation with T4XC & R4C
Gary & Steve, RRRR Understand. I just ran a on air test with my friend Marty, KK4RF....it worked flawlessly running separate. I have a counter monitoring my transmit frequency which help when doing a
By N3WM - Bill · #75363 ·
Re: CW Operation with T4XC & R4C
Bill, The offset is so high because the carrier oscillator signal has to go through the crystal filter.? As John's mod lowered the offset, going farther outside the filter reduces the drive and
By Gary WB6OGD · #75362 ·
Re: CW Operation with T4XC & R4C
Put the carrier oscillator back. Pad/adjust the C59(?) in the R-4x Or put in the Drake recommended FSK circuit and reconfigure it for RIT. Bill, you can use EXT MUTE and the sidetone if you want.?
By Gary WB6OGD · #75361 ·
Re: Replace Shure 444 Mic Cable
Thanks Greg. Perfect. -- 73 John?N4YE
By John N4YE · #75360 ·
Re: CW Operation with T4XC & R4C
Back in the '80s when I was running several C lines for serious CW contesting, I found I could somewhat mitigate the extremely high transmit frequency offset in CW by padding down the T-4XC carrier
By Randy Farmer W8FN · #75359 ·
Re: CW Operation with T4XC & R4C
Good to hear you got it sussed, Bill! Yeah, Drake (and many manufacturers) long ago decided on, what it to me and a lot of people who operate CW, a very high frequency offset. Unfortunately, there's
By Steve Wedge, W1ES/4 · #75358 ·
Re: CW Operation with T4XC & R4C
GM Gary, I ran some test with the set up and it works very well.? Thank You Bill N3WM
By N3WM - Bill · #75357 ·
Re: CW Operation with T4XC & R4C
Gary, Thank you for your response...I really appreciate it. I will give it a try this morning..? you can't beat this Drake group for assistance. I love the Drake gear but I gotta wonder why they went
By N3WM - Bill · #75356 ·
Re: CW Operation with T4XC & R4C
Bill, The simple way is to leave your R-4C ON (as opposed to EXT MUTE).? Turn down the sidetone. Set Tx to CW, Rx to LSB. Hit the key.? You now hear your exact transmitted signal.? Note the tone,
By Gary WB6OGD · #75355 ·
CW Operation with T4XC & R4C
Gentlemen, I have a classic T4XC & R4C set up that I could use some advice with operating CW. Has anyone written a procedure to set them up for CW operation? I have read the paragraph in the T4XC
By N3WM - Bill · #75354 ·
Re: TR7 with low power on 15 and 10 meter
OK, 90 watts is typical for 10m unless it has been repaired with more modern transistors. Sounds like you are on the right track. Don't feel too bad, I have a Yaesu FT707 on the bench that has been
By Jim Shorney · #75353 ·
Re: TR7 with low power on 15 and 10 meter
Hehe... Hi Jim, Yes, I did re-adjust the Pre-Driver gain pot. And the driver bias is there when in Tx. The voltages are strange and about a possible out of band oscillation on 10m, when I connected
By Raoul Meunier · #75352 ·
Need Part Number for TR-6 CW filter
Drakers, I need a little help.? I misplaced the manual for my TR-6 and I need the part number for the 300 Hz CW filter. I tried on-line, however the manual. that I found listed the availability of
By Gene Balinski K1NR · #75351 ·
Re: T-4XC, R-4C, MS-4, MN-4, AC-4 Manuals
Here's a good site... http://www.ea1ddo.es/drake.html -- 73, Kevin, K8KVN
By Kevin Kampman · #75350 ·
Re: T-4XC, R-4C, MS-4, MN-4, AC-4 Manuals
Even quicker, a simple Google search will turn up a plethora of manual sources of varying quality. Some free, others not. 73 -Jim NU0C "Matthew VE3MXG" <ve3mxg@...> wrote: -- 73 -Jim NU0C
By Jim Shorney · #75349 ·
Re: T-4XB CW Key Up Hum
I guess I should have avoided confusion on my original post. The memory of possibly fixing the issue before with a hayseed capacitor can was on a different set of twins. I honestly don't remember for
By Tim Randa <randaranch@...> · #75348 ·
Re: T-4XC, R-4C, MS-4, MN-4, AC-4 Manuals
Good Morning Everyone, Thank you very much for the quick replies.? They were very helpful! 73 VE3MXG Matt
By Matthew VE3MXG · #75347 ·
Re: Replace Shure 444 Mic Cable
Shure 444 Desk Microphone (High Impedance) User Guide https://pubs.shure.com/view/guide/444/en-US.pdf Original cable (70A253) was 2-conductor (black and white) shielded with plastic outer jacket, 7
Re: Replace Shure 444 Mic Cable
Thanks everyone. -- 73 John?N4YE
By John N4YE · #75345 ·