Final amplifier Bias

Stephen Farthing

#171

Hi Yan,

Can you check that R6 is 6K8 please.

Regards,

Steve

--
It is vain to do with more that which can be done with less.

Re: [Knightsqrss] 80M SV beacon

Arv Evans

#170

开云体育

Hans...& others

These QRSS beacons (and the grabbers) seem to be popping up on many bands
and on many frequencies.? This seems to suggest that we each need QRSS Beacon
transmitters for all bands, and for many frequencies.

That then suggests that the Keyer chip could be installed in a separate chassis
and used as a controller for any, or all, of several different QRSS transmitters.

Arv K7HKL
_._

Show quoted text

-------- Original Message --------

 On 10/20/2010 4:13 AM, EMMANOUIL MANTZARAS wrote:
> Hallo Knights
>
> 500 mw at 3.500863Mhz precision carrier and QRSS 6 "BKE" every 30 min.
> QRSS 6 also at 7000863Mhz beacon
> Details on the clipboard
> 73 de sv1bke
>
>
>
>
>
> _______________________________________________
> Knightsqrss mailing list
> Knightsqrss@...
> 
> Knightsqrss clipboard 
> Knightsqrss blog 
>
I'll start listening for you around your sunrise.  I also plan to be 
active on 80 in about 1 month with my QRS Labs kit which still needs to 
be soldered up.

73 bill w4hbk



_______________________________________________
Knightsqrss mailing list
Knightsqrss@...

Knightsqrss clipboard 
Knightsqrss blog

Keyer chip clarification

Stephen Farthing

#169

Hi all,

I lied about the pull ups....i really meant pull downs...sorry.

Steve

--
It is vain to do with more that which can be done with less.

Keyer chip clarification

"hanssummers2000"

#168

Hi all

Just some comments regarding the recent keyer chip thread:

1) Do NOT use 10K pull-ups! It won't work! You need pull-DOWN's! Not up! If you see this problem, then you can connect a 10K resistor between each of pins 5, 6, 7 and ground. Alternatively, if you wish you can ground each of the pins 5, 6 and 7 which you have not linked to Vcc.

2) Regarding the 12wpm: The intended function of the keyer is that you will get a 12wpm callsign once when you power up, followed by QRSS (at whatever speed you have selected). You then get the 12wpm callsign again once every approximately 10 minutes. This was intended as a full speed callsign identifier every 10 minutes, but only really useful if the keyer is used in a plain on/off keyed QRSS system rather than an FSK/CW system. So don't get alarmed when you see the 12wpm ident at switch on! This is entirely normal!

3) The variation in audio tone of a few 10's of Hz which Steve mentioned, is because the AVR is clocked only using its internal RC-based system clock at 9.6MHz. The stability of this clock source, and the variation between devices, is several percent. So both the audio tone, and the precise timing, can vary by a few percent.

Any other questions please shout!

73 Hans G0UPL

Re: Funny thing happening to keyer chip

Paul Maciel

#167

Hello Neil and Paul,

I had the same problem. Once I grounded the unused pins as Hans suggested all was fine.

73,
---Paul AK1P

Show quoted text

From: PaulG
To: QRPLabs@...
Sent: Sun, October 17, 2010 8:10:24 PM
Subject: [QRPLabs] Re: Funny thing happening to keyer chip

Neil

I have gotten the same thing with my PIC keyer chip. Hans suggested grounding all the unused pins on the PIC. With the jumper for 3Sec dots it seems to send the call at 12 WPM once every few min then goes back to QRSS. I have not grounded the unsed pins yet.

Paul K3PG 10.140.070

--- In QRPLabs@..., "Neil" wrote:
>
> I just finished putting my 30m QRSS kit together yesterday evening (certainly more interesting than X Factor) and every thing seems to be functioning. I have run the keyer in its default 12 WPM setting and it rattles through my callsign once at the selected speed. After that it reverts to the 6 second dit rate. This is just an observation as I do not intend to run at 12WPM but was wondering if there may be a bug in the program. I will try it at other speeds to see what happens and will also try another chip that Hans prepared earlier this year.
>
> Neil
> G7AQK
>

Re: Funny thing happening to keyer chip

"PaulG"

#166

Neil

I have gotten the same thing with my PIC keyer chip.  Hans suggested grounding all the unused pins on the PIC.  With the jumper for 3Sec dots it seems to send the call at 12 WPM once every few min then goes back to QRSS.  I have not grounded the unsed pins yet.

Paul K3PG 10.140.070

Show quoted text

--- In QRPLabs@..., "Neil" <g7aqk.uk@...> wrote:

I just finished putting my 30m QRSS kit together yesterday evening (certainly more interesting than X Factor) and every thing seems to be functioning. I have run the keyer in its default 12 WPM setting and it rattles through my callsign once at the selected speed. After that it reverts to the 6 second dit rate. This is just an observation as I do not intend to run at 12WPM but was wondering if there may be a bug in the program. I will try it at other speeds to see what happens and will also try another chip that Hans prepared earlier this year.

Neil
G7AQK

Re: Funny thing happening to keyer chip

Stephen Farthing

#165

Hi guys,

I think there is some variation in the ATTiny13 keyer chips. having programmed over 150 of them with the software using exactly the same programming arrangement I would say 1 in 10 chips exhibits this behaviour (and as an aside the AF frequency in 12wpm mode also varies by some 10s of Hz between chips). Some builders have also experienced the same issue when using homebrew PSUs rather than the mobile phone (Nokia) chargers that Hans and I use...the 10k pullups should solve the issue.

Regards,

Steve

Show quoted text

On 17 October 2010 19:53, Nigel Evans <nigel.m0nde@...> wrote:

?

All,

?

This is very interesting because I had same issue.? I was also just monitoring my signal and mine just set the NDE of M0NDE fast then carried on ate qrss.? Please confirm connection you made Arv, did you just put a resistor in place of a single link?

73 Nigel M0NDE

?

?

On 17 October 2010 19:45, Arv Evans <arvid.evans@...> wrote:

?

Neil G7AQK

I had to add 10K pull-up resistors to the speed selection jumpers.? This solved my
problems with unreliable setting of speed, and other strange behavior.

Arv K7HKL
_._

On 10/17/2010 02:22 AM, Neil wrote:
?

I just finished putting my 30m QRSS kit together yesterday evening (certainly more interesting than X Factor) and every thing seems to be functioning. I have run the keyer in its default 12 WPM setting and it rattles through my callsign once at the selected speed. After that it reverts to the 6 second dit rate. This is just an observation as I do not intend to run at 12WPM but was wondering if there may be a bug in the program. I will try it at other speeds to see what happens and will also try another chip that Hans prepared earlier this year.

Neil
G7AQK

--
73 de Nigel Evans
M0NDE QTH Dover

Check out details of the Dover Radio Rally 2011

Whitfield Village Hall

--
It is vain to do with more that which can be done with less.

Re: Funny thing happening to keyer chip

Nigel Evans

#164

All,

?

This is very interesting because I had same issue.? I was also just monitoring my signal and mine just set the NDE of M0NDE fast then carried on ate qrss.? Please confirm connection you made Arv, did you just put a resistor in place of a single link?

73 Nigel M0NDE

?

On 17 October 2010 19:45, Arv Evans <arvid.evans@...> wrote:

Show quoted text

?

Neil G7AQK

I had to add 10K pull-up resistors to the speed selection jumpers.? This solved my
problems with unreliable setting of speed, and other strange behavior.

Arv K7HKL
_._

On 10/17/2010 02:22 AM, Neil wrote:
?

I just finished putting my 30m QRSS kit together yesterday evening (certainly more interesting than X Factor) and every thing seems to be functioning. I have run the keyer in its default 12 WPM setting and it rattles through my callsign once at the selected speed. After that it reverts to the 6 second dit rate. This is just an observation as I do not intend to run at 12WPM but was wondering if there may be a bug in the program. I will try it at other speeds to see what happens and will also try another chip that Hans prepared earlier this year.

Neil
G7AQK

--
73 de Nigel Evans
M0NDE QTH Dover

Check out details of the Dover Radio Rally 2011

Whitfield Village Hall

Re: Funny thing happening to keyer chip

Arv Evans

#163

开云体育

Neil G7AQK

I had to add 10K pull-up resistors to the speed selection jumpers.? This solved my
problems with unreliable setting of speed, and other strange behavior.

Arv K7HKL
_._

On 10/17/2010 02:22 AM, Neil wrote:

Show quoted text

?

I just finished putting my 30m QRSS kit together yesterday evening (certainly more interesting than X Factor) and every thing seems to be functioning. I have run the keyer in its default 12 WPM setting and it rattles through my callsign once at the selected speed. After that it reverts to the 6 second dit rate. This is just an observation as I do not intend to run at 12WPM but was wondering if there may be a bug in the program. I will try it at other speeds to see what happens and will also try another chip that Hans prepared earlier this year.

Neil
G7AQK

Funny thing happening to keyer chip

"Neil"

#162

I just finished putting my 30m QRSS kit together yesterday evening (certainly more interesting than X Factor) and every thing seems to be functioning. I have run the keyer in its default 12 WPM setting and it rattles through my callsign once at the selected speed. After that it reverts to the 6 second dit rate. This is just an observation as I do not intend to run at 12WPM but was wondering if there may be a bug in the program. I will try it at other speeds to see what happens and will also try another chip that Hans prepared earlier this year.

Neil
G7AQK

Re: Low power SWR measurement

"Neil"

#161

Thanks for the links Arv. The current indicator certainly looks simple enough.

Neil

Show quoted text

--- In QRPLabs@..., Arv Evans <arvid.evans@...> wrote:

Neil G7AQK

These URLs might help:

<>

<>

Arv K7HKL

On 10/13/2010 03:33 PM, Neil wrote:

Does anyone have an easy method of matching your antenna to the 30m
QRSS beacon? My SWR meter is not sensitive enough to work with the
beacon kit and my QRO rig does not do 30m, but I do have a 30m receiver.

Neil
G7AQK

Re: Low power SWR measurement

Arv Evans

#160

开云体育

Neil G7AQK

These URLs might help:

??? ???

??? ???

Arv K7HKL

On 10/13/2010 03:33 PM, Neil wrote:

Show quoted text

?

Does anyone have an easy method of matching your antenna to the 30m QRSS beacon? My SWR meter is not sensitive enough to work with the beacon kit and my QRO rig does not do 30m, but I do have a 30m receiver.

Neil
G7AQK

Low power SWR measurement

"Neil"

#159

Does anyone have an easy method of matching your antenna to the 30m QRSS beacon? My SWR meter is not sensitive enough to work with the beacon kit and my QRO rig does not do 30m, but I do have a 30m receiver.


Neil
G7AQK

Re: Newbie questions

Dominic Baines

#158

Thanks Hans... probably explains it.

72

Dom
M1KTA

Show quoted text

From: hanssummers2000 <hans.summers@...>
To: QRPLabs@...
Sent: Tue, 12 October, 2010 19:43:35
Subject: [QRPLabs] Re: Newbie questions

Hi Dom

When apply power the signal is spread over maybe 10Hz initially (wide band)
after couple seconds it calms down and is a single signal.I wonder if that is AGC action? It'll be a massive signal into your receiver and

probably the AGC either in the receiver, or in Argo, will take a little time toadjust to it.

That's my suggestion... other than that, not sure of any other possibilities!

72/3 Hans G0UPL

Re: Newbie questions

"hanssummers2000"

#157

Hi Dom

When apply power the signal is spread over maybe 10Hz initially (wide band) after couple seconds it calms down and is a single signal.I wonder if that is AGC action? It'll be a massive signal into your receiver and probably the AGC either in the receiver, or in Argo, will take a little time to adjust to it.

That's my suggestion... other than that, not sure of any other possibilities!

72/3 Hans G0UPL

Newbie questions

"Dominic"

#156

Hi all,

Just managed to get a 30m kit built. Just testing into a dummy load right now.

When apply power the signal is spread over maybe 10Hz initially (wide band) after couple seconds it calms down and is a single signal.

Is this normal?

Run the output through a splitter/tap into a digital oscilloscope that also works as a spectrum analyser and I calculate 56mW out.

Argo displays nice clean signal abt 4Hz wide.

PSU BTW is an ATX PSU, added lots of chokes and RF clean now. 5.12V
I can see small variations in the signal though and if I monitor the output using ARGO.

72

Dom
ON/M1KTA

Final amplifier Bias

"Yannick (XV4TUJ)"

#155

Hi.

Having few spare time in october I just finished assembling the beacon kit.
Everything seems running ok but I am not happy with the 2N7000 bias setting.
Running the beacon at 5-6V, even with the potentiometer fully clockwise turned, I have more than 6V peak-to-peak on a 50r load.
Nothing bad but the FET is running too hot for me. The documentation states that it should not get noticeably warm...

What can I check / do ?

Thanks by advance for your help.
73,
Yan.
---
Yannick DEVOS - XV4TUJ
 (Blog in french)
 (web page in english)

Beacon on air test

"PaulG"

#154

Beacon was on the air last night with 3 sec dots on about 10.14070.  Using the CW mode (upper side) on a FT-1000 to read the Freq.  Keyer seems stable and is reverting to a 12 wpm ID every 10 min or so then returning to 3 sec dot mode.  Ant is not well matched yet, but will remember to use the peak V and not the P-P V for power computation.

Paul K3PG

Re: Beacon is running

"hanssummers2000"

#153

Hi Paul

Thanks for your comments.  The beacon has been running for several days now and the final seems ok temp wise with the output at 5.08V.  I used this table of RF volts into 50 ohms

As others already noted, the table is peak voltage, not peak-to-peak. That's where the missing division by 2 comes from.

Also bear in mind that table is for 50 ohm load. You were using 36 ohms so it needs to be adjusted.

One problem I am seeing is the keyer often 'locks' up after sending the call once or a few times.  Once though it ran all nite and was still keying.   I wonder if it is related to the supply ?  I am using an old Heathkit Reg P/S IP-18 that seems stable and clean.This seems to happen sometimes and I think is due to the floating inputs. My recommendation is to ground any of the pins 5, 6 and 7 which you haven't tied to +Vcc. That normally will address this problem.

73 de Hans G0UPL

Power Calculations

"PaulG"

#152

OK on the power formula and the P-P vs. Peak Volts.  Will work on antenna connection and move it to the slow speed.

Paul K3PG