Date   

Cricket 30 loud buzzing

Jess Gypin
 

Well,
I verified all components and placement on the board confirmed that all solder joints are good and no solder bridges or shorts.
I have confirmed that when the unit is powered up the oscillator is running. I get .9 or so Watts out. Transmit tone is clean. So having said all that, where do you all think I should start looking? I have not verified operation of the audio chain. A lot of the radios that I have built with a similar problem was a bad ground somewhere. I have a 25 KHz scope (yeah I know not enough band width) and a couple of good DVMs.

Jess AE0CW


Re: BJ build - TX Xtal doesn't swing

Jess Gypin
 

Do you mean not oscillate?

On Apr 30, 2018, at 9:10 AM, Raimund Reh <raimund.reh@...> wrote:

hi folks
got my BJ ready yesterday, but both delivered xtal doesn't swing in this circuit.
xtal is rather ok according to xtal tester.
All parts are all right and in place.
Just for fun I put a 80m xtal in - it works!
I raise C28 to 0.005uF without success.
So I need your kind support.
Thank's alot & cheers - Ray, DL1EGR



BJ build - TX Xtal doesn't swing

Raimund Reh
 

hi folks
got my BJ ready yesterday, but both delivered xtal doesn't swing in this circuit.
xtal is rather ok according to xtal tester.
All parts are all right and in place.
Just for fun I put a 80m xtal in - it works!
I raise C28 to 0.005uF without success.
So I need your kind support.
Thank's alot & cheers - Ray, DL1EGR


Re: Cricket 30 Output Power Statistics

Chuck Carpenter
 

Even a fresh 9V battery has a high internal impedance.  And they droop quickly with a significant load.

Using a good power supply, well filtered and regulated would be requisite.  Also measure the key-down current and the power input to the final amp: determine efficiency. Then there is the also mentioned power meter. The QRPometer is a 2% accuracy meter, as I recall.
Otherwise, you might get good results with everyone using the same measuring method; a peak detector or an RF probe for instance and account for their associated tolerances.  A 10 meg, 1% DVM would help too. 

As Terry sez, from his QC experience and mine too, measurement can be a tricky business. Especially if you don't have traceability to a "gold standard"...
--
Chuck Carpenter, W5USJ
EM22cv Rains County, TX


Re: Bayou Jumper?

Jim, N5IB
 

The Soup'er does NOT provide any DC isolation on the speaker lines.
So you still need to make sure that neither audio output lead has a DC path to ground, as you saw in the Appendix of the manual.

If you have one of the newest, rev A(c), circuit boards, there are some extra pads provided (JP2 and JP3) where the appropriate blocking capacitor(s) can be mounted. Then you cut the exposed trace(s) between the pad(s) on the bottom side of the board to put the cap(s) into the circuit.

A powered speaker with a self-contained battery supply can be used without needing a DC block. But if either of the external speaker connections has a DC path to the same ground as the BJ (like back through a wall wart power supply) it would short out and damage the audio chip.

N5IB


Re: Bayou Jumper?

Jeff Fein
 

If you are using a powered speaker you should be able to plug the pick up into the headphone jack, I would think!

Jeff
VK3GMO

-----Original Message-----
From: main@4SQRP.groups.io [mailto:main@4SQRP.groups.io] On Behalf Of Bob Parr
Sent: Monday, April 30, 2018 12:48 PM
To: main@4SQRP.groups.io
Subject: [4SQRP] Bayou Jumper?

I know there are some extra steps advised if you are going to connect a BJ to an external speaker or powered speakers. Does the Soup'r Up'r take care of that? Or would I still need to make a special connector cable with caps?

Bob
KG5GTE


Re: Cricket 30 Output Power Statistics

wa2cky
 

Just as a FYI, another ham who built the Cricket found a strong dependence of power output with variations in the battery voltage (actually he substituted an external power supply and simply varied it). And obviously the various power meters we use throw another statistical uncertainty in there. It would be a nice little statistical analysis project for someone!

73
Bob Groh, WA2CKY 

On Sun, Apr 29, 2018 at 5:34 PM, Gandalf The Gray <ronhogrider92@...> wrote:
Between .6 and 1 is really not much to write home about if I read your message correct.
The recipient won’t notice a difference.

Ron wb1hga

On Apr 29, 2018, at 12:45 PM, WA0ITP <wa0itp@...> wrote:

Tnx to all who responded to my request for the output power made by your Cricket 30s.

I received 8 responses, .6, 1, .7, .6, .8, 1, 1, and .9.  all on a 9V battery. The average is .8W.  Several made measurements on 12 volts and all were 1W or a bit more.

The data points show how manufacturing variation in the parts affects performance.  Wonder if receive sensitivity is affected as much xmitter performance, hmmm.

Being an old science teacher and manufacturing QC guy, this is interesting stuff.  I didn't expect to see such a large range in the data, min to max, in only 8 samples.  If this data spread came from a process I was monitoring, some quick studies would be warranted to find the root cause. OTOH there is just a little over 2 dB between 1 and .6, so if 1W can make haul, so can .6

Anyone else want to add their rig's info to the database? 

-- the rest 
72 WAØITP
I love this radio stuff.
Back to the bench, Winter is too valuable to waste.
www.wa0itp.com
www.4sqrp.com



Bayou Jumper?

Bob Parr
 

I know there are some extra steps advised if you are going to connect a BJ to an external speaker or powered speakers. Does the Soup'r Up'r take care of that? Or would I still need to make a special connector cable with caps?

Bob
KG5GTE


Re: Cricket 30 Output Power Statistics

Gandalf The Gray <ronhogrider92@...>
 

Between .6 and 1 is really not much to write home about if I read your message correct.
The recipient won’t notice a difference.

Ron wb1hga

On Apr 29, 2018, at 12:45 PM, WA0ITP <wa0itp@...> wrote:

Tnx to all who responded to my request for the output power made by your Cricket 30s.

I received 8 responses, .6, 1, .7, .6, .8, 1, 1, and .9.  all on a 9V battery. The average is .8W.  Several made measurements on 12 volts and all were 1W or a bit more.

The data points show how manufacturing variation in the parts affects performance.  Wonder if receive sensitivity is affected as much xmitter performance, hmmm.

Being an old science teacher and manufacturing QC guy, this is interesting stuff.  I didn't expect to see such a large range in the data, min to max, in only 8 samples.  If this data spread came from a process I was monitoring, some quick studies would be warranted to find the root cause. OTOH there is just a little over 2 dB between 1 and .6, so if 1W can make haul, so can .6

Anyone else want to add their rig's info to the database? 

-- the rest 
72 WAØITP
I love this radio stuff.
Back to the bench, Winter is too valuable to waste.
www.wa0itp.com
www.4sqrp.com


Re: Cricket 30 Output Power Statistics

gary Lyons
 

On 4/29/2018 12:45 PM, WA0ITP wrote:
Tnx to all who responded to my request for the output power made by your Cricket 30s.

I received 8 responses, .6, 1, .7, .6, .8, 1, 1, and .9.  all on a 9V battery. The average is .8W.  Several made measurements on 12 volts and all were 1W or a bit more.

The data points show how manufacturing variation in the parts affects performance.  Wonder if receive sensitivity is affected as much xmitter performance, hmmm.

Being an old science teacher and manufacturing QC guy, this is interesting stuff.  I didn't expect to see such a large range in the data, min to max, in only 8 samples.  If this data spread came from a process I was monitoring, some quick studies would be warranted to find the root cause. OTOH there is just a little over 2 dB between 1 and .6, so if 1W can make haul, so can .6

Anyone else want to add their rig's info to the database? 

-- the rest 
72 WAØITP
I love this radio stuff.
Back to the bench, Winter is too valuable to waste.
www.wa0itp.com
www.4sqrp.com

Terry, et al,

Finally cleared out all that "other stuff that happens in life" and getting back to clearing the email.

Every Cricket30 that tested in our room at the OzarkCon Builders' Session all reached .9 - 1.1w output as measured by a QRPOmeter.  This was all done with fresh 9V batteries that I distributed to each builder.  While there may be some variability in component tolerances I suspect the power supply may potentially (yep, pun intended!) have a more noticeable effect.  Mine here has always put out right at 1W on my very scientifically uncalibrated MFG meter.

--
73, Gary/w0gx


Re: Cricket 30 Output Power Statistics

John Lonigro
 

Terry:

You might ask how fresh the 9 volt batteries were, as well as the brand and the key-down terminal voltage when the power reading was taken.  Your analysis might be comparing batteries (or perhaps Wattmeters) more than crickets.

72,
John, AA0VE

On 04/29/2018 01:36 PM, Ron wrote:

Using 9V Duracell battery, my rig gets .7W out into dummy load as measured with my Diamond SWR/Power meter.

 

72 - Ron - AG1P

 

From: main@4SQRP.groups.io [mailto:main@4SQRP.groups.io] On Behalf Of WA0ITP
Sent: Sunday, April 29, 2018 9:45 AM
To: Cricket; 4sqrpio
Subject: [4SQRP] Cricket 30 Output Power Statistics

 

Tnx to all who responded to my request for the output power made by your Cricket 30s.

I received 8 responses, .6, 1, .7, .6, .8, 1, 1, and .9.  all on a 9V battery. The average is .8W.  Several made measurements on 12 volts and all were 1W or a bit more.

The data points show how manufacturing variation in the parts affects performance.  Wonder if receive sensitivity is affected as much xmitter performance, hmmm.

Being an old science teacher and manufacturing QC guy, this is interesting stuff.  I didn't expect to see such a large range in the data, min to max, in only 8 samples.  If this data spread came from a process I was monitoring, some quick studies would be warranted to find the root cause. OTOH there is just a little over 2 dB between 1 and .6, so if 1W can make haul, so can .6

Anyone else want to add their rig's info to the database? 


-- the rest 
72 WAØITP
I love this radio stuff.
Back to the bench, Winter is too valuable to waste.
www.wa0itp.com
www.4sqrp.com


Re: Cricket 30 Output Power Statistics

AG1P Ron
 

Using 9V Duracell battery, my rig gets .7W out into dummy load as measured with my Diamond SWR/Power meter.

 

72 - Ron - AG1P

 

From: main@4SQRP.groups.io [mailto:main@4SQRP.groups.io] On Behalf Of WA0ITP
Sent: Sunday, April 29, 2018 9:45 AM
To: Cricket; 4sqrpio
Subject: [4SQRP] Cricket 30 Output Power Statistics

 

Tnx to all who responded to my request for the output power made by your Cricket 30s.

I received 8 responses, .6, 1, .7, .6, .8, 1, 1, and .9.  all on a 9V battery. The average is .8W.  Several made measurements on 12 volts and all were 1W or a bit more.

The data points show how manufacturing variation in the parts affects performance.  Wonder if receive sensitivity is affected as much xmitter performance, hmmm.

Being an old science teacher and manufacturing QC guy, this is interesting stuff.  I didn't expect to see such a large range in the data, min to max, in only 8 samples.  If this data spread came from a process I was monitoring, some quick studies would be warranted to find the root cause. OTOH there is just a little over 2 dB between 1 and .6, so if 1W can make haul, so can .6

Anyone else want to add their rig's info to the database? 


-- the rest 
72 WAØITP
I love this radio stuff.
Back to the bench, Winter is too valuable to waste.
www.wa0itp.com
www.4sqrp.com


Cricket 30 Output Power Statistics

WA0ITP
 

Tnx to all who responded to my request for the output power made by your Cricket 30s.

I received 8 responses, .6, 1, .7, .6, .8, 1, 1, and .9.  all on a 9V battery. The average is .8W.  Several made measurements on 12 volts and all were 1W or a bit more.

The data points show how manufacturing variation in the parts affects performance.  Wonder if receive sensitivity is affected as much xmitter performance, hmmm.

Being an old science teacher and manufacturing QC guy, this is interesting stuff.  I didn't expect to see such a large range in the data, min to max, in only 8 samples.  If this data spread came from a process I was monitoring, some quick studies would be warranted to find the root cause. OTOH there is just a little over 2 dB between 1 and .6, so if 1W can make haul, so can .6

Anyone else want to add their rig's info to the database? 

-- the rest 
72 WAØITP
I love this radio stuff.
Back to the bench, Winter is too valuable to waste.
www.wa0itp.com
www.4sqrp.com


Re: New Radio Disease Discovered

Andy S
 

Jerry:  I connected an Arduino to my Cricket 80a and made a beacon for fox hunting (ARDF).  The documentation and Arduino source code can be freely downloaded from Sourceforge:  https://sourceforge.net/projects/kb1oiq-ham-radio-projects/files/80m_ardf/

Have a lot of fun, and 73,

Andy
KB1OIQ


Re: Cricket audio hum or buzz no signal reception

Jess None
 

Will check that

On Apr 28, 2018, at 10:03 AM, Brian Crittendon via Groups.Io <aaa5mi@...> wrote:

I had a radio that did that. It turned out to be a bad ground between the head phones and the radio. 


Re: Bayou Jumper?

Retired Doc
 

Thanks, Guys for the input.  I pushed the wings in a little so the contacts are centered in the bushing, but the bushing can slide of easily.

Kent KC9LIF


Re: New Radio Disease Discovered

WA0ITP
 

Hee, good one Bill, and very true - I got it.
72 WAØITP
I love this radio stuff.
Back to the bench, Winter is too valuable to waste.
www.wa0itp.com
www.4sqrp.com
On 4/28/2018 7:36 AM, dekle wrote:

The CDCC (Center for Disease Control in Claremore) has identified a new illness that could put many Amateur Radio Operators at risk.

The symptoms are:
1. Staying up late at night, unsupervised, and without permission trying to make QSOs on a Cricket Transceiver.
2. The inability to stop using Cricket Transceivers even after the initial Certificate has been earned.
3. An uncontrollable urge to chirp.

The first confirmed case is a Kansas man - Will (K0WDO) - who has earned the first 30m endorsement sticker for his Cricket Society Certificate.

Although there is no known cure, the CDCC will continue to monitor the situation and report any additional findings.

73
Bill
KV6Z


Re: Cricket audio hum or buzz no signal reception

Brian Crittendon
 

I had a radio that did that. It turned out to be a bad ground between the head phones and the radio. 


Re: New Radio Disease Discovered

Jerry Brown
 

Is anyone using the Cricket as beacon at low power for 3.5 mHz Fox Hinting (ARDF)?

A big event is just over the horizon


73,

Jerry N4EO

On Sat, Apr 28, 2018 at 7:36 AM, dekle <dekle@...> wrote:
The CDCC (Center for Disease Control in Claremore) has identified a new illness that could put many Amateur Radio Operators at risk.

The symptoms are:
1. Staying up late at night, unsupervised, and without permission trying to make QSOs on a Cricket Transceiver.
2. The inability to stop using Cricket Transceivers even after the initial Certificate has been earned.
3. An uncontrollable urge to chirp.

The first confirmed case is a Kansas man - Will (K0WDO) - who has earned the first 30m endorsement sticker for his Cricket Society Certificate.

Although there is no known cure, the CDCC will continue to monitor the situation and report any additional findings.

73
Bill
KV6Z



New Radio Disease Discovered

dekle <dekle@...>
 

The CDCC (Center for Disease Control in Claremore) has identified a new illness that could put many Amateur Radio Operators at risk.

The symptoms are:
1. Staying up late at night, unsupervised, and without permission trying to make QSOs on a Cricket Transceiver.
2. The inability to stop using Cricket Transceivers even after the initial Certificate has been earned.
3. An uncontrollable urge to chirp.

The first confirmed case is a Kansas man - Will (K0WDO) - who has earned the first 30m endorsement sticker for his Cricket Society Certificate.

Although there is no known cure, the CDCC will continue to monitor the situation and report any additional findings.

73
Bill
KV6Z