Re: looking for non-US keyer chip
Attiny85 chip very affordable anywhere and you can get the software from github. -- __________________________
.----------------. .----------------. .----------------. .----------------. .----------------. .----------------.
| .--------------. || .--------------. || .--------------. || .--------------. || .--------------. || .--------------. |
| | _________ | || | __ | || | _ _ | || | ____ ____ | || | ________ | || | ___ ____ | |
| | |_ ___ | | || | / \ | || | | | | | | || | |_ || _| | || | | __ _| | || | |_ ||_ _| | |
| | | |_ \_| | || | / /\ \ | || | | |__| |_ | || | | |__| | | || | |_/ / / | || | | |_/ / | |
| | | _| _ | || | / ____ \ | || | |____ _| | || | | __ | | || | .'.' _ | || | | __'. | |
| | _| |___/ | | || | _/ / \ \_ | || | _| |_ | || | _| | | |_ | || | _/ /__/ | | || | _| | \ \_ | |
| | |_________| | || ||____| |____|| || | |_____| | || | |____||____| | || | |________| | || | |____||____| | |
| | | || | | || | | || | | || | | || | | |
| '--------------' || '--------------' || '--------------' || '--------------' || '--------------' || '--------------' |
'----------------' '----------------' '----------------' '----------------' '----------------' '----------------' .----------------. .----------------. .----------------. .----------------. .----------------. .----------------. | .--------------. || .--------------. || .--------------. || .--------------. || .--------------. || .--------------. | | | _________ | || | __ | || | _ _ | || | ____ ____ | || | ________ | || | ___ ____ | | | | |_ ___ | | || | / \ | || | | | | | | || | |_ || _| | || | | __ _| | || | |_ ||_ _| | | | | | |_ \_| | || | / /\ \ | || | | |__| |_ | || | | |__| | | || | |_/ / / | || | | |_/ / | | | | | _| _ | || | / ____ \ | || | |____ _| | || | | __ | | || | .'.' _ | || | | __'. | | | | _| |___/ | | || | _/ / \ \_ | || | _| |_ | || | _| | | |_ | || | _/ /__/ | | || | _| | \ \_ | | | | |_________| | || ||____| |____|| || | |_____| | || | |____||____| | || | |________| | || | |____||____| | | | | | || | | || | | || | | || | | || | | | | '--------------' || '--------------' || '--------------' || '--------------' || '--------------' || '--------------' | '----------------' '----------------' '----------------' '----------------' '----------------' '----------------'
?
.----------------. .----------------. .----------------. .----------------. .----------------. .----------------.
| .--------------. || .--------------. || .--------------. || .--------------. || .--------------. || .--------------. |
| | _________ | || | __ | || | _ _ | || | ____ ____ | || | ________ | || | ___ ____ | |
| | |_ ___ | | || | / \ | || | | | | | | || | |_ || _| | || | | __ _| | || | |_ ||_ _| | |
| | | |_ \_| | || | / /\ \ | || | | |__| |_ | || | | |__| | | || | |_/ / / | || | | |_/ / | |
| | | _| _ | || | / ____ \ | || | |____ _| | || | | __ | | || | .'.' _ | || | | __'. | |
| | _| |___/ | | || | _/ / \ \_ | || | _| |_ | || | _| | | |_ | || | _/ /__/ | | || | _| | \ \_ | |
| | |_________| | || ||____| |____|| || | |_____| | || | |____||____| | || | |________| | || | |____||____| | |
| | | || | | || | | || | | || | | || | | |
| '--------------' || '--------------' || '--------------' || '--------------' || '--------------' || '--------------' |
'----------------' '----------------' '----------------' '----------------' '----------------' '----------------'
?
.----------------. .----------------. .----------------. .----------------. .----------------. .----------------.
| .--------------. || .--------------. || .--------------. || .--------------. || .--------------. || .--------------. |
| | _________ | || | __ | || | _ _ | || | ____ ____ | || | ________ | || | ___ ____ | |
| | |_ ___ | | || | / \ | || | | | | | | || | |_ || _| | || | | __ _| | || | |_ ||_ _| | |
| | | |_ \_| | || | / /\ \ | || | | |__| |_ | || | | |__| | | || | |_/ / / | || | | |_/ / | |
| | | _| _ | || | / ____ \ | || | |____ _| | || | | __ | | || | .'.' _ | || | | __'. | |
| | _| |___/ | | || | _/ / \ \_ | || | _| |_ | || | _| | | |_ | || | _/ /__/ | | || | _| | \ \_ | |
| | |_________| | || ||____| |____|| || | |_____| | || | |____||____| | || | |________| | || | |____||____| | |
| | | || | | || | | || | | || | | || | | |
| '--------------' || '--------------' || '--------------' || '--------------' || '--------------' || '--------------' |
'----------------' '----------------' '----------------' '----------------' '----------------' '----------------'
?
.----------------. .----------------. .----------------. .----------------. .----------------. .----------------.
| .--------------. || .--------------. || .--------------. || .--------------. || .--------------. || .--------------. |
| | _________ | || | __ | || | _ _ | || | ____ ____ | || | ________ | || | ___ ____ | |
| | |_ ___ | | || | / \ | || | | | | | | || | |_ || _| | || | | __ _| | || | |_ ||_ _| | |
| | | |_ \_| | || | / /\ \ | || | | |__| |_ | || | | |__| | | || | |_/ / / | || | | |_/ / | |
| | | _| _ | || | / ____ \ | || | |____ _| | || | | __ | | || | .'.' _ | || | | __'. | |
| | _| |___/ | | || | _/ / \ \_ | || | _| |_ | || | _| | | |_ | || | _/ /__/ | | || | _| | \ \_ | |
| | |_________| | || ||____| |____|| || | |_____| | || | |____||____| | || | |________| | || | |____||____| | |
| | | || | | || | | || | | || | | || | | |
| '--------------' || '--------------' || '--------------' || '--------------' || '--------------' || '--------------' |
'----------------' '----------------' '----------------' '----------------' '----------------' '----------------'
?
.----------------. .----------------. .----------------. .----------------. .----------------. .----------------.
| .--------------. || .--------------. || .--------------. || .--------------. || .--------------. || .--------------. |
| | _________ | || | __ | || | _ _ | || | ____ ____ | || | ________ | || | ___ ____ | |
| | |_ ___ | | || | / \ | || | | | | | | || | |_ || _| | || | | __ _| | || | |_ ||_ _| | |
| | | |_ \_| | || | / /\ \ | || | | |__| |_ | || | | |__| | | || | |_/ / / | || | | |_/ / | |
| | | _| _ | || | / ____ \ | || | |____ _| | || | | __ | | || | .'.' _ | || | | __'. | |
| | _| |___/ | | || | _/ / \ \_ | || | _| |_ | || | _| | | |_ | || | _/ /__/ | | || | _| | \ \_ | |
| | |_________| | || ||____| |____|| || | |_____| | || | |____||____| | || | |________| | || | |____||____| | |
| | | || | | || | | || | | || | | || | | |
| '--------------' || '--------------' || '--------------' || '--------------' || '--------------' || '--------------' |
'----------------' '----------------' '----------------' '----------------' '----------------' '----------------'
?
___ ___ __ _ _ ____ _ __
| __>| . | /. | | | ||_ /| / /
| _> | |/_ .|| | / / | \
|___>|_|_| |_| |_|_|/___||_\_\
___ ___ __ _ _ ____ _ __
| __>| . | /. | | | ||_ /| / /
| _> | |/_ .|| | / / | \
|___>|_|_| |_| |_|_|/___||_\_\
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___ ___ __ _ _ ____ _ __
| __>| . | /. | | | ||_ /| / /
| _> | |/_ .|| | / / | \
|___>|_|_| |_| |_|_|/___||_\_\
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___ ___ __ _ _ ____ _ __
| __>| . | /. | | | ||_ /| / /
| _> | |/_ .|| | / / | \
|___>|_|_| |_| |_|_|/___||_\_\
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___ ___ __ _ _ ____ _ __
| __>| . | /. | | | ||_ /| / /
| _> | |/_ .|| | / / | \
|___>|_|_| |_| |_|_|/___||_\_\
73's !
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Re: QMX Using Z-Match ATU Blown Finals -- Twice
It's been mentioned many times in this group. I have a power cord with a buck converter to keep my 12V QMX fed with 11.5V.
Brian n1bs
On Sat, Mar 2, 2024 at 9:44?AM Howard Lamhut < Howardlam@...> wrote: I’m surprised more people haven’t mentioned this… But if your QMX is built for 12 V you should never apply more than 12 V.
If your QMX was built for 9 V you should never apply more than 9 V.
It’s fairly easy to damage your finals if you apply more power than 12 or 9 V depending on the build voltage.
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Re: QMX Using Z-Match ATU Blown Finals -- Twice
I’m surprised more people haven’t mentioned this… But if your QMX is built for 12 V you should never apply more than 12 V.
If your QMX was built for 9 V you should never apply more than 9 V.
It’s fairly easy to damage your finals if you apply more power than 12 or 9 V depending on the build voltage.
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Re: Another QMX Receive Issue Thread
OK! That's great news, Jason!? Congrats on the repair and VY 73 OM. JZ KJ4A?
Lo and behold, of course the back cover didn't fit thanks to the diode, I knew that but didn't remember when tacking it on.? So I took that off and put another on closer down at board level.? Since I was in there with the iron hot I reflowed the IC.? Cleaned it up, put it back together, and powered it up.? Sounds coming through again, nice and clean.? Yay, happy night.? Thanks for the advice John!
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Re: Another QMX Receive Issue Thread
Lo and behold, of course the back cover didn't fit thanks to the diode, I knew that but didn't remember when tacking it on.? So I took that off and put another on closer down at board level.? Since I was in there with the iron hot I reflowed the IC.? Cleaned it up, put it back together, and powered it up.? Sounds coming through again, nice and clean.? Yay, happy night.? Thanks for the advice John!
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Re: Another QMX Receive Issue Thread
John, got some ICs in and did the fix tonight.? If you wouldn't mind glancing over this and giving me some experienced feedback before I power it on again it'd be much appreciated.
Masked it off with some duct tape so hot air wouldn't affect much else.? Came off rather clean.? After this photo I added some flux and wicked a bit of the raised solder off.
Verified old to new and started tacking it on.? Looks decent from the top.
Until I get it around to about this angle and I see pin 1 especially is a little blobby but ok, nothing _looks_ touching.
But I go ahead with the diode which turned out good (imo).? But then I get another angle at the 1-8 pins and see it looks much different in that light.? Especially 1, 4, 8, and maybe 2.? Guessing it's worth going back and putting some more flux on and reflow.? Thoughts?
Thanks so much for your advice.
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Re: #qdxm QDX-M - new single-band version of QDX available
#qdxm
Hans Hi
Using 5 Volts (you can not blow anything :) ) from an USB and no LPFs no BPFs (bypass 7805)
I tested 2200m, 630m, 160m, 80m, 60m, 40m, 30m, 20m, 17m, 15m, 12m, 11m, 10m and 6m on transmit with the same QDX-M
all working (I transmitted less than 5 seconds each)
do not, repeat again do not try this with more than 5 Volts with no LPFs
you will definetely blow your Q6 and/or BS170s and/or IC5
73 DE muhsin TA1MHS
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Re: QMX Using Z-Match ATU Blown Finals -- Twice
--Ooops, the power meter was between the QMX and the Tuner
Chuck, W5USJ
EM22cv, Rains Co., Texas
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Re: QMX Using Z-Match ATU Blown Finals -- Twice
Evan,
I had Vcc at 9V this last time. I think the power with WM-2 and dummy load was about 1.2W
Next I switched to antenna with tuner in adjust mode. The bridge is about 1.5:1 SWR.
The failure happened when I switched to operate mode.
--
Chuck, W5USJ
EM22cv, Rains Co., Texas
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Re: #qmx high band harmonics
#qmx
Thanks, Evan,
I do have two dummy loads, the larger of which can handle up to 150W.? So I'll plan to build either the Salas or Hayward 40dB pickoff and follow it with a step attenuator.
Eric
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Re: QMX Using Z-Match ATU Blown Finals -- Twice
Further info: The QMX, like the QDX power, will change with the impedance.? I have noted an increase in power ratings for SWRs that, when I put it on a dummy load, are 1.5 watts or more lower.? This could happen while you are adjusting for the LED dip.
73
Evan
AC9TU
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Re: QMX Using Z-Match ATU Blown Finals -- Twice
Try using 12v rather than 13.6v. ?They are not the same for QMX purposes.
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Re: QMX Using Z-Match ATU Blown Finals -- Twice
Hi Chuck,
Sorry to read of your problem.??
I believe that the QMX has an SWR function that is at reduced power.? It might be better to use it to adjust the Z-Match.? That would give you an easier-to-read number rather than an LED intensity.
Just a suggestion/
73
Evan
AC9TU
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Re: #qmx high band harmonics
#qmx
Hi Eric,
For best results, keep the input at the TinySA under -25DBm.? That means for 5 watts, a total of 36-(-25) = 61 DB.? An additional power attenuator of either 20 or 30 DB would be a good addition.? Get one rated for the highest power that you will be measuring.? If you intend to measure 100-watt QRO rigs, use a 40-db attenuator.
A Tap would be a lower-cost choice if you already have a 100-watt dummy load.? Here are directions on how to build one:
I built a slightly different tap from a no longer available webpage.? I have attached the PDF that I got from the site.
73
Evan
AC9TU
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Re: #qmx high band harmonics
#qmx
Thanks. ? I am getting a QRP Kits 41dB step attenuator, recommended in this forum.? What isn't clear to me, from the tinySA Ultra specifications, is whether its "recommended input power below -25dBm" is before or after the SA's built-in attenuator.? How do you read it?
Eric
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QMX Using Z-Match ATU Blown Finals -- Twice
I've used variations pretty much the same Z-Match tuner for many years.
Since the first NorCal BLT
Wasn't trying to get more power, just reducing the reflected RF for better SWR.
Supply voltage was 13.6 and band was 20 m.?
I don't recall exactly what happened the first time. But it was when I switched from
Adjust to Operate.? One suggestion was to reduce power and don't hot-switch.
I don't think I hot-switched. Another suggestion was an inductive spike.
Anyway, sent it off, got it fixed, and the same thing happened again. This time
supply voltage at 9, 30m, and I know I didn't hot switch. Also adjusted for noise
peak first.
I've used this tuner with everything from Rock-Mites to a uSDX+ with no problems. uSDX finals are
similar to the QMX, I think.? Used the same setup with the uSDX right after and no problem.?
Clueless in the suburbs of Point and Emory, Rains Co., Texas? EM22cv.
Chuck, W5USJ
EM22cv, Rains Co., Texas
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Re: #QMX #Finals...did I kill it?
#qmx
It would take more RF power than the radio can develop to hurt those capacitors it seems. The ESR (equivalent? series resistance) is quite low.
?The possibility of cracked capacitors or defective solder joints remain.
JZ
On Thu, Feb 29, 2024, 10:32?PM John Zbrozek < jdzbrozek@...> wrote: Mordan42,
How is it doing on receive?
Check C510 and C526 to see if they are damaged. If either have cracked or have been overstressed by high RF current, output power will be very low.
JZ KJ4A?
Digikey has BS17s in stock ?for 0.59 each.? Buy 10 and you will have spares …
--
73, Bernie, VE3FWF
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Re: looking for non-US keyer chip
Thank you to everyone who replied, it took some time to follow up on the links and suggestions. It would have suited me well to have found a good compromise keyer kit with enclosure, a real time saver, something basic but with a potentiometer speed adjustment. Fortunately, I think I have parts on hand to build a version of the K3NG, I'd like one with sidetone output to use as a practice oscillator for the bug and straight key. I'm a SKCC member from years ago, but in need of practice before going on air to torture other CW ops :-) Ron VE8RT VE8TEA On Fri, 01 Mar 2024 05:32:21 -0800 "Graham, VE3GTC" <colonelkrypton@...> wrote: Ron,
I think you are referring to the old Curtis Electro Devices 8043/8044 morse keyer chip ???If so, I have no idea where you might get one these days.
As good a device as it was, there are better ways to get there today.
It seems that W3PM has an Arduino sketch program for a W1EL Winkeyer Arduino clone. I don't know any more about it other than what I find on this web page:
Digikey is the way to go. Orders to a Canadian address of more than $100 CDN ship free ( Purolator or Fedex, can't remember which ), under $100 a flat fee of less than $10. I can order early on Monday and often have my package on Tuesday. All customs are taken care of and shipped from Winnipeg. Plus they have nearly anything and everything you might want - products from Sparkfun, Adafruti, Raspberry Pi, and so on;? I wouldn't surprise me on day to find QRP Labs stuff too ;)
Digikey - PayPal - inexpensive flat fee shipping or free - delivery to your day by courier and I suspect that is even true in Yellowknife and you know you are getting good prime parts and products.? As good as Amazon, maybe even better in some respects.
cheers, Graham ve3gtc ( near Ottawa )
-- Ron VE8RT <ve8rt@...>
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Re: #QMX #Finals...did I kill it?
#qmx
It bummed me out too!!!
--
Bill Harbour
K4VIB
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Re: looking for non-US keyer chip
Ron,
I think you are referring to the old Curtis Electro Devices 8043/8044 morse keyer chip ???If so, I have no idea where you might get one these days.
As good a device as it was, there are better ways to get there today.?
It seems that W3PM has an Arduino sketch program for a W1EL Winkeyer Arduino clone. I don't know any more about it other than what I find on this web page:
Digikey is the way to go. Orders to a Canadian address of more than $100 CDN ship free ( Purolator or Fedex, can't remember which ), under $100 a flat fee of less than $10. I can order early on Monday and often have my package on Tuesday. All customs are taken care of and shipped from Winnipeg. Plus they have nearly anything and everything you might want - products from Sparkfun, Adafruti, Raspberry Pi, and so on;? I wouldn't surprise me on day to find QRP Labs stuff too ;)
Digikey - PayPal - inexpensive flat fee shipping or free - delivery to your day by courier and I suspect that is even true in Yellowknife and you know you are getting good prime parts and products.? As good as Amazon, maybe even better in some respects.
cheers, Graham ve3gtc ( near Ottawa )
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Howard Lamhut
Chuck Carpenter