Date   
Re: Squelch Control??

 

Sarma,

 

The IF-S is “IF Shift”, it is not a squelch unless a new firmware update has given this function dual modes somehow???

 

David A Posthuma, WD8PUO

1 (616) 283-7703

 

From: BITX20@groups.io <BITX20@groups.io> On Behalf Of MVS Sarma
Sent: Tuesday, July 23, 2019 11:27 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Squelch Control??

 

Hi Bob,

If you use kd8cec firmware, you have a facility "if-s"

Push if-s button and adjust the silder to minimum hash. All the best.

 

Sarma vu3zmv

 

On Tue, 23 Jul 2019, 8:16 pm , <K2CRR@...> wrote:

Maybe I have missed it, but has anyone devised a squelch circuit for the uBitx?  I often monitor a net for extended times and the constant "hash" is tiresome and I will eventually stop monitoring.

Tnx,

Bob - K2CRR

Re: Squelch Control??

MVS Sarma
 

Thanjs David, i know that. The op was keen on reducing hash sound. It really helps to reduce it.

Regards. 
Sarma vu3zmv

On Tue, 23 Jul 2019, 11:53 pm David Posthuma, <davep@...> wrote:

Sarma,

 

The IF-S is “IF Shift”, it is not a squelch unless a new firmware update has given this function dual modes somehow???

 

David A Posthuma, WD8PUO

1 (616) 283-7703

 

From: BITX20@groups.io <BITX20@groups.io> On Behalf Of MVS Sarma
Sent: Tuesday, July 23, 2019 11:27 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Squelch Control??

 

Hi Bob,

If you use kd8cec firmware, you have a facility "if-s"

Push if-s button and adjust the silder to minimum hash. All the best.

 

Sarma vu3zmv

 

On Tue, 23 Jul 2019, 8:16 pm , <K2CRR@...> wrote:

Maybe I have missed it, but has anyone devised a squelch circuit for the uBitx?  I often monitor a net for extended times and the constant "hash" is tiresome and I will eventually stop monitoring.

Tnx,

Bob - K2CRR

Re: Squelch Control??

 

Okay, sorry for butting in.

 

David A Posthuma, WD8PUO

 

From: BITX20@groups.io <BITX20@groups.io> On Behalf Of MVS Sarma
Sent: Tuesday, July 23, 2019 2:32 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Squelch Control??

 

Thanjs David, i know that. The op was keen on reducing hash sound. It really helps to reduce it.

 

Regards. 

Sarma vu3zmv

 

On Tue, 23 Jul 2019, 11:53 pm David Posthuma, <davep@...> wrote:

Sarma,

 

The IF-S is “IF Shift”, it is not a squelch unless a new firmware update has given this function dual modes somehow???

 

David A Posthuma, WD8PUO

1 (616) 283-7703

 

From: BITX20@groups.io <BITX20@groups.io> On Behalf Of MVS Sarma
Sent: Tuesday, July 23, 2019 11:27 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Squelch Control??

 

Hi Bob,

If you use kd8cec firmware, you have a facility "if-s"

Push if-s button and adjust the silder to minimum hash. All the best.

 

Sarma vu3zmv

 

On Tue, 23 Jul 2019, 8:16 pm , <K2CRR@...> wrote:

Maybe I have missed it, but has anyone devised a squelch circuit for the uBitx?  I often monitor a net for extended times and the constant "hash" is tiresome and I will eventually stop monitoring.

Tnx,

Bob - K2CRR

Re: Squelch Control??

MVS Sarma
 

In continustion of my post, i humbly request to please go through kd8cec comments in link below.

Regards
Sarma vu3zmv

On Tue, 23 Jul 2019, 11:53 pm David Posthuma, <davep@...> wrote:

Sarma,

 

The IF-S is “IF Shift”, it is not a squelch unless a new firmware update has given this function dual modes somehow???

 

David A Posthuma, WD8PUO

1 (616) 283-7703

 

From: BITX20@groups.io <BITX20@groups.io> On Behalf Of MVS Sarma
Sent: Tuesday, July 23, 2019 11:27 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Squelch Control??

 

Hi Bob,

If you use kd8cec firmware, you have a facility "if-s"

Push if-s button and adjust the silder to minimum hash. All the best.

 

Sarma vu3zmv

 

On Tue, 23 Jul 2019, 8:16 pm , <K2CRR@...> wrote:

Maybe I have missed it, but has anyone devised a squelch circuit for the uBitx?  I often monitor a net for extended times and the constant "hash" is tiresome and I will eventually stop monitoring.

Tnx,

Bob - K2CRR

Calibration UBITX using function generator

Michael Reifenberger
 

Hi,
I have a siglent sdg2000 function generator which can generate AM/AM-DSB signals too.
How can this be used to check/calibrate the VFO/BFO of the UBITX with CEC Firmware?

Thanks in advance.

73
---
mike


--
73
---
Michael (DD4MR)

Re: Antuino

 

any more word on fixes for the V1?
--
David

 N8DAH
Kit-Projects.com

Shop is open!

Re: Squelch Control??

Wayne Leake
 

 A squelch is normally only used with FM, and sometimes AM.
 With SSB and CW, it cuts in and out way too much..
 Would require a delay circuit to make it practical at all, other than AM and FM.
 I have used transceivers since 1959 (FM taxi Service), and otherwise from early 1970s.
 I don't mind the noise. If it gets too much, its time for a break anyway.
  I'll add that squelch can be good with any reception that uses a constant carrier, but is not very goof with no continuous carrier.
Or maybe where you have a delay circuit and don't care about weak signals that can drop out at times
I rarely use the squelch on my Icom 706 MK II G, other than with FM.
Wayne WA2YNE


Re: Squelch Control??

Tom, wb6b
 

My ancient Kenwood HF SSB transceiver has a squelch. The time it takes for the squelch to re-squelch the signal seems to be delayed the same amount as the AGC recovery setting. 

The squelch on SSB is very touchy, between just squelching and squelching too much. However, it is great for the frequency the local club hangs out on. If a conversation starts up, one of the close by hams will break the squelch and I'll open it up so I can here what is going on with everyone near and far. Saves my ears from having to listen to static all day. Modern rigs may have better squelches. 

Tom, wb6b

Re: Squelch Control??

Gordon Gibby <ggibby@...>
 

​Thank you for that real-world input!   May I ask what band your group uses?


Gordon



From: BITX20@groups.io <BITX20@groups.io> on behalf of Tom, wb6b <wb6b@...>
Sent: Wednesday, July 24, 2019 3:06 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Squelch Control??
 
My ancient Kenwood HF SSB transceiver has a squelch. The time it takes for the squelch to re-squelch the signal seems to be delayed the same amount as the AGC recovery setting. 

The squelch on SSB is very touchy, between just squelching and squelching too much. However, it is great for the frequency the local club hangs out on. If a conversation starts up, one of the close by hams will break the squelch and I'll open it up so I can here what is going on with everyone near and far. Saves my ears from having to listen to static all day. Modern rigs may have better squelches. 

Tom, wb6b

Re: Squelch Control??

Robert D. Bowers
 

If I may add in on this conversation:

I would love to have squelch available on SSB - I use an external DSP noise filter I acquired on my BitX40 to make it more tolerable (and wish I had a working squelch on it).  I may eventually see if I can cobble together a working squelch circuit to add to my BitX - I have too many other projects going right now.

There are different types of noise... based on the audio spectrum.  Pink noise, white noise, and quantum noise are three I'm familiar with.  Quantum noise is what you get from a radio receiver (not white noise!).

Quantum noise is known to be especially irritating - a baby's cry is another form of that noise, and there are others (I think fingernails on a chalk board is also one).  We live in a noisy enough environment - having radio static hiss would just add to it (too much noise is bad for your health and hearing)! 

Bob

N4FBZ

On 7/24/19 3:06 AM, Tom, wb6b wrote:
My ancient Kenwood HF SSB transceiver has a squelch. The time it takes for the squelch to re-squelch the signal seems to be delayed the same amount as the AGC recovery setting. 

The squelch on SSB is very touchy, between just squelching and squelching too much. However, it is great for the frequency the local club hangs out on. If a conversation starts up, one of the close by hams will break the squelch and I'll open it up so I can here what is going on with everyone near and far. Saves my ears from having to listen to static all day. Modern rigs may have better squelches. 

Tom, wb6b

Re: Antuino

rnharp@...
 

Thanks for the reply, also I love my V5 uBitx. I may get another

Re: Squelch Control??

Bob Fischer, Fischer Technical Services
 


I have also been using transceivers since the 1950s.
I do make regular use of squelch on both my IC-706M II Gs.  At home and in the mobile. 
I use their squelch controls on SSB all the time. 
Just writing to legitimize the gentleman's request for a simple squelch.  I would like to have one too.
I have tinkered with a PARALLEL combination of 2 diodes and a 500 Ohm potentiometer in series with one of the speaker wires.  Connect the diodes with opposite polarities (+ end of one to the - end of the other).  All three components in parallel.  At zero Ohms, the diodes are shorted out.  Not a real "squelch" circuit.  Audio is clipped and distorted by the diodes but the pot CAN be set to reduce noise and still hear strong stations while listening on a net frequency.  Volume control setting affects the setting of the 500 Ohm pot.  It did not work well enough for me to wire it in permanently.  I just turn the volume down low and enjoy the background music of the universe.
Bob  WB8BEL

 

From: "Wayne Leake" <wayneleake@...>
To: BITX20@groups.io
Sent: Tuesday, July 23, 2019 5:33:01 PM
Subject: Re: [BITX20] Squelch Control??

 A squelch is normally only used with FM, and sometimes AM.
 With SSB and CW, it cuts in and out way too much..
 Would require a delay circuit to make it practical at all, other than AM and FM.
 I have used transceivers since 1959 (FM taxi Service), and otherwise from early 1970s.
 I don't mind the noise. If it gets too much, its time for a break anyway.
  I'll add that squelch can be good with any reception that uses a constant carrier, but is not very goof with no continuous carrier.
Or maybe where you have a delay circuit and don't care about weak signals that can drop out at times
I rarely use the squelch on my Icom 706 MK II G, other than with FM.
Wayne WA2YNE



Support bracket for Raduino / uBitx

John Scherer
 

Its nothing fancy but it works for me so I thought others might find it useful.  I designed this bracket a month or so ago and it works well with in my Hammond 1402DV enclosure.  I had originally 3d printed this part in PLA but will be reprinting it in ABS for better thermal resilience. I can provide a .step cad file if needed too.

https://www.thingiverse.com/thing:3768607/files

--
John - N0CTL - Fulltime RV in a 40' motorhome

Spectrum analyzer fun

Gordon Gibby <ggibby@...>
 

Oh what fun!

Yesterday I built a simple capacitively coupled "probe" to be used with my (1st ever!) spectrum analyzer.   A series cap of 0.01/1kV, 4700 ohm resistor, and 100 ohm to ground, (should have used 50 but didn't have it) -- then coax cable to the spectrum analyzer.


Gives roughly 15 dB attenuation based on touching the tracking generator signal.


Allows me to actually SEE the oscillators and signals as I roam around the uBix.   Wow, the signals are TINY all around the receiver, and most of the gain must be in the audio section....


I built this for 2 reasons: primarilly so I can do this demo for our upcoming Extra Class course, and let people SEE mixers in action and oscillators and filters.   Sending in a 100kHz calibrator (harmonics every 100 kHz) shows ALL the signals heading into the 45 MHz filter --- and then poof, only 1 left afterwards!


2nd, I have a heathkit SB-102 with local oscillator problems and this will help.

​Fascinating.


Gordon Gibby KX4Z




Re: Spectrum analyzer fun

 

Congrats Gordon! have fun.

Right now I am about to be admitted to the Mentuino hospital. Resullt of having fun with an Antuino.
I redid the IF amp and ended up with 0db at its output showing as -20dbm. Sounds simple but
almost gone nuts trying to fix it!

Raj


At 25-07-19, you wrote:

Oh what fun!

Yesterday I built a simple capacitively coupled "probe" to be used with my (1st ever!) spectrum analyzer.   A series cap of 0.01/1kV, 4700 ohm resistor, and 100 ohm to ground, (should have used 50 but didn't have it) -- then coax cable to the spectrum analyzer.


Gives roughly 15 dB attenuation based on touching the tracking generator signal.


Allows me to actually SEE the oscillators and signals as I roam around the uBix.   Wow, the signals are TINY all around the receiver, and most of the gain must be in the audio section....


I built this for 2 reasons: primarilly so I can do this demo for our upcoming Extra Class course, and let people SEE mixers in action and oscillators and filters.   Sending in a 100kHz calibrator (harmonics every 100 kHz) shows ALL the signals heading into the 45 MHz filter --- and then poof, only 1 left afterwards!


2nd, I have a heathkit SB-102 with local oscillator problems and this will help.

Fascinating.


Gordon Gibby KX4Z



Re: Squelch Control??

John (vk2eta)
 

Bob,

The most effective squelch I know of for this purpose is a syllabic squelch which detects human voice and ignores static crashes and tones. They are built for example in the CODAN radios and in my experience are very effective.

I found a rather old schematic published in the 73 Magazine from August 1982. The design was by W9MKV and W9YAN and used four ICs (2 x TL084C, 1 x CD4047, 1 x LM339) and was titled "Smart" Squelch for SSB.

There is an eBay kit (no relation to me and not tested by me) that seems to use the same principle. It is labeled "VOS (Voice Operated Squelch) Audio Muting Kit Form" and is from Canada.

Hope that helps,

73, John (VK2ETA)
 

Re: Squelch Control??

antonio diaz
 


Em qui, 25 de jul de 2019 às 08:30, John (vk2eta) <vk2eta@...> escreveu:

Bob,

The most effective squelch I know of for this purpose is a syllabic squelch which detects human voice and ignores static crashes and tones. They are built for example in the CODAN radios and in my experience are very effective.

I found a rather old schematic published in the 73 Magazine from August 1982. The design was by W9MKV and W9YAN and used four ICs (2 x TL084C, 1 x CD4047, 1 x LM339) and was titled "Smart" Squelch for SSB.

There is an eBay kit (no relation to me and not tested by me) that seems to use the same principle. It is labeled "VOS (Voice Operated Squelch) Audio Muting Kit Form" and is from Canada.

Hope that helps,

73, John (VK2ETA)
 

Re: Squelch Control??

Tom, wb6b
 

On Wed, Jul 24, 2019 at 02:40 AM, Gordon Gibby wrote:
Thank you for that real-world input!   May I ask what band your group uses?
Hi Gordon,

We have a net on the weekend at 8 am pacific time on 75 meters. At that time of the day we have good coverage to our local group (in Southern California) as well as few additional hams in Arizona and Northern California. Throughout the day the 75 meter band generally works well for our local members. 

75 meters has a fairly high background noise level here, none the less it has the right coverage for local and a few folks farther out.

Tom, wb6b

Re: Spectrum analyzer fun

 

is it too soon to share the fix?
--
David

 N8DAH
Kit-Projects.com

Shop is open!

Re: Spectrum analyzer fun

Laurence Oberman
 

Awesome,
While I am an extra I would love a recording of that class as it will
have years of experience included :)
I did spend a bunch of money recently to take the Besser Associates RF
technology class to give myself a full refresh of all things RF.

Make me wish I had stayed in RF years ago instead of software.

Nice job Sir

Regards
Laurence

On Thu, Jul 25, 2019 at 4:41 AM Gordon Gibby <ggibby@...> wrote:

Oh what fun!

Yesterday I built a simple capacitively coupled "probe" to be used with my (1st ever!) spectrum analyzer. A series cap of 0.01/1kV, 4700 ohm resistor, and 100 ohm to ground, (should have used 50 but didn't have it) -- then coax cable to the spectrum analyzer.


Gives roughly 15 dB attenuation based on touching the tracking generator signal.


Allows me to actually SEE the oscillators and signals as I roam around the uBix. Wow, the signals are TINY all around the receiver, and most of the gain must be in the audio section....


I built this for 2 reasons: primarilly so I can do this demo for our upcoming Extra Class course, and let people SEE mixers in action and oscillators and filters. Sending in a 100kHz calibrator (harmonics every 100 kHz) shows ALL the signals heading into the 45 MHz filter --- and then poof, only 1 left afterwards!


2nd, I have a heathkit SB-102 with local oscillator problems and this will help.

Fascinating.


Gordon Gibby KX4Z