Re: #clock firmware development request
#clock
There have been a number of clock feature requests over the last year. Yours is another good one. So far no word from Han's...
|
On 17/09/2018 13:24, Tim O'Rourke wrote: Swapped micro from the other kit. What are chances both could have gotten thru un-programmed? I would have thought you would have to be very unlucky. Acts the same with either processor. Have a bit less than 5 volts on pins 7 and 20.
Is it possible to do a complete programming with AVR USB programmer? Yes. Do NOT erase the EEPROM section of the ATMega. If the programming is not at fault you gain nothing. I suggested the swap because it is a quick and easy test. As it still does not work, I would now invest more time thoroughly checking other options. Re Pins 7 & 20. How much 'a bit less than 5 volts' ? Enough to imply excessive current draw ? assuming not..... Note, it is the relationship between the rise time at switch on of these two pins that is critical. As a quick and dirty test strap them together with a shorting link and then power up the QCX to see if it makes any difference.
|
Re: My latest QCX 40 problem...
Jim, Check the driver transistor that's right before the finals. It can take a beating if the finals fail. Regards, Mike M. KU4QO
On Fri, Sep 14, 2018 at 5:06 PM, Jim - K9DD <jdawson@...> wrote: Thanks, I will.
|
VE1VDM 80M Report ( including Australia )
All I can say is the propagation on 80M WSPR last night was the best that I have ever experienced. ? I was heard by 91 unique stations during the period from 0000z last evening to 1150z this morning. ? The highlite of the session was being heard by my good friend David ( VK2DDI ) in Berry Mountain .. 16,926km!!!!!! ? I was also on FSKCW and was spotted by SA6BSS, WD2ELG, and G4JVF. I wish that there were more of you that would listen for QRSS TX on the lower bands. Winter is coming and so ?will the good propagation. ? The QRP Labs U3S coupled with the QRP Labs 5 Watt PA feeding the full size Windom did a fantastic job! ? Here is the plot for last night. ? 73, Vernon ?
? ?
|
Re: New Built 20m QCX slight issue , help please
i can not find a peek on the front end capacitor , in fact its fully meshed, so i added 5 extra turns to T1 , still the same, i put a 39pf cap across the variable Cap but again still no peek, best tone is still at full mesh??? Sounds like T1 leads are not correctly soldered. i can hear some form of rapid pulsing noise Try turning off the signal level display option.
|
Swapped micro from the other kit. What are chances both could have gotten thru un-programmed?
Acts the same with either processor. Have a bit less than 5 volts on pins 7 and 20.
Is it possible to do a complete programming with AVR USB programmer?
Tim?
|
On 17/09/2018 01:24, Tim O'Rourke wrote: Just finished building one of my kits, So I am assuming you have another. As your post implies the processor clock is running and the LCD has correctly initialised. Historically, in the early days there had been the odd ATMega slipping through which the programming had not taken properly. Perform a processor swap-over with your other kit, quick and easy to do.
|
Hey Ken,
Thanks for the good thorough info.? One more cup of coffee and
I'll give it another go.
73 Vince N1VIN
On 9/17/2018 2:49 AM, KEN G4APB via
Groups.Io wrote:
toggle quoted message
Show quoted text
Hi Vince,
I set mine up as follows;
U3S v3.12a:-
Slots 0-3 RX mode (= 4 x 2 minutes = 8 minutes of Rx time) Set
freq to USB RX freq (dial)
CAL 10 115 (takes 2 minutes plus display of cal)
FRAME 10 00? (made from 8 mins of Rx + CAL cycle).
PARK 4 and (4x RX dial LO freq)? ?= allows Rx during CAL mode.
WSPR set RADIO to None, CAT etc to none, choose
your audio input (mic/ USB adaptor etc).Set your Maidenhead
locator and callsign normally.
73 Ken G4APB
|
Alan, obviously so did I.? Thanks for the input.
73 Vince N1VIN
toggle quoted message
Show quoted text
On 9/17/2018 3:49 AM, Alan G4ZFQ wrote: G4ZFQ wrote:
? Do I also need to set up a Rx Mode in U3S set up?
Sorry, I missed section 3.17
73 Alan G4ZFQ
|
Re: RD15HVF1 transistor Mod
Hi Alan,
Yes i had looked at these previous threads and found them most interesting and i will follow them more closely.
I think i will have to purchase a second U3S & PA? so that i have one for tinkering around on VHF and one for HF.
I was not expecting that sort of output I would be happy with 5W +.
i would be interested to see what other members have done.
Regards
Stuart?Vk5ade
|
Re: Solder temp for QCX Board
I¡¯d agree, lead free is not as nice to work with as leaded but we don¡¯t have to use lead free here unless we are building things for sale so it¡¯s perfectly acceptable to use Pb/Sn and still legal to buy.?
Don't use lead free Euro-solder. That generally solves most soldering issues!
-- Clint. M0UAW IO83
No trees were harmed in the sending of this mail. However, a large number of electrons were greatly inconvenienced.
|
Re: RD15HVF1 transistor Mod
Hi Stuart,
Check out the past threads, there are a few.
To start you off, the latest I recall is
/g/QRPLabs/topic/24236390#25831
It starts off about the U3S at 2Mtrs and then introduces some
information on the PA, at least one other contributor is using the
Mitsubishi FET.
Just don't expect to see 15w out as it stands.
Remember the PA kit was optimised for HF use,
so expect to have to change the frequency conscious components for
it to perform.
regards Alan
On 17/09/2018 09:21, Stuart Cameron
Vk5ade wrote:
toggle quoted message
Show quoted text
Hello group, i would like to find out from other group members who
have done this mod if there are any other changers to the
components or is it just a straight swap.
I have purchased the original Mitsubishi RD15HVF1 transistor.
I would like to operate the U3S on the 2M band.
I see in the spec that it will handle up to 15 watts.
Any information would be most appreciated.
Regards
Stuart Vk5ade
?
|
Hello group, i would like to find out from other group members who have done this mod if there are any other changers to the components or is it just a straight swap.
I have purchased the original Mitsubishi RD15HVF1 transistor.
I would like to operate the U3S on the 2M band.
I see in the spec that it will handle up to 15 watts.
Any information would be most appreciated.
Regards
Stuart Vk5ade
?
|
G4ZFQ wrote: ? Do I also need to set up a Rx Mode in U3S set up?
Sorry, I missed section 3.17 73 Alan G4ZFQ
|
Hi Vince,
I set mine up as follows;
U3S v3.12a:-
Slots 0-3 RX mode (= 4 x 2 minutes = 8 minutes of Rx time) Set freq to USB RX freq (dial)
CAL 10 115 (takes 2 minutes plus display of cal)
FRAME 10 00? (made from 8 mins of Rx + CAL cycle).
PARK 4 and (4x RX dial LO freq)? ?= allows Rx during CAL mode.
WSPR set RADIO to None, CAT etc to none, choose your audio input (mic/ USB adaptor etc).Set your Maidenhead locator and callsign normally.
73 Ken G4APB
|
Reseated the processor, checked and 20Mhz oscillator is working, did the L5 mod also. Tim Looks like you've read the troubleshooting. Have you checked LCD voltages and very carefully checked the solder joints? Not too much to go wrong between the LCD and processor. 73 Alan G4ZFQ
|
? Do I also need to set up a Rx Mode in U3S set up? Vince, No, park mode is the RX setting. 2.? WSPR Station Settings is asking for PTT mode (CAT, DTR, RTS and VOX).? Which should I select? None. WSPR is not controlling TX. Set for RX only. 73 Alan G4ZFQ
|
Re: Progrock, gps and receiver, gps pick up.
On 16/09/2018 17:11, M0RON wrote: If I touch input pins of IC3, 4 and pin 5 of IC6 I get an ac hum in phones, getting louder through the chain. If I touch the other pins on ic6, pins 1,2 or 3, I get nothing. Voltage on pin 1 and 7 ic6 are correct.
LO is progrock at 4x receive frequency. Andy, I've never checked like that, not sure about IC6 but if you get hum before that then presumably it's OK. You have grounded the RX mute? Have you checked voltages on T3, C3-6 Q2? Might give a clue. The receiver picks up the data burst from the qlg1 gps loudly. Where would this get in given no signals are seen or heard when put onto an antenna? The data is LF pulses, presumably getting into the audio stages somehow. 73 Alan G4ZFQ
|
Re: Hellschreiber on U3S
#u3s
On Sun, Sep 16, 2018 at 08:02 PM, M Lu wrote:
Remind me ¨C what is your super-duper antenna?
?
I'm currently using a ~40 foot vertical end-fed wire held up by a 12 meter . ?I use two ~20 foot long ground radials with a 9:1 UnUn and a . Definitly not very efficient (or super duper), but it gets me to New Zealand and Iceland on the 30m band using less that a watt. :) John AA7US
|
FW: [QRPLabs] Hellschreiber on U3S #u3s + Image
#u3s
This one has the image attached!!! ?
toggle quoted message
Show quoted text
From: Peter Mulhare [mailto:peter@...]
Sent: Monday, 17 September 2018 16:45
To: '[email protected]'
Subject: RE: [QRPLabs] Hellschreiber on U3S #u3s? John ? Just starting to see your Hellschreiber in ZL!? 0445z ? ? 73's ? Pete ZL2iK/ZL4Ei ? RF74ci Northland New Zealand ? ? ? ? Thank you Andy!
Using slow Hellschreiber mode with the speed you recommended did the trick. ?It looks great.
Yes... despite the reduced signal strength, a little beaconing variety is what I'm looking for. ;)
73,
John
AA7US
|
BrianB
Alan de G1FXB
AA7US
Peter Mulhare