Date   
Re: uBITX Encoder PPR ??

K5ESS
 

Also, many of the encoders from ebay that have the threaded shaft don’t provide the mounting nut required. It’s an M7 x 0.75 metric nut  I bought 50 of them so if anyone needs one I can send them one or two for an SASE.

Mike

K5ESS

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Jack Purdum via Groups.Io
Sent: Wednesday, October 17, 2018 9:54 PM
To: BITX20@groups.io
Subject: Re: [BITX20] uBITX Encoder PPR ??

 

Opps! I forgot to add that you should make sure you buy encoders with threaded shafts. Many do not have a threaded shaft and it makes it a little more of a hassle to mount them.

 

Jack, W8TEE

 

On Wednesday, October 17, 2018, 10:46:27 PM EDT, Jack Purdum via Groups.Io <jjpurdum@...> wrote:

 

 

eBay listing 301679318759 shows a 20ppr KY-040 encoder that I have used in many Arduino projects. Buy 10 for about $1 each. I also have a Borne optical encoder that has 60 ppr but costs around $30. Both work fine, but the optical encoders don't have the "detent" feel, which I like, but most do not. Brian Low has an excellent encoder library that works with most encoders on the Arduino or Teensy platform, including those mentioned above: https://github.com/brianlow/Rotary

 

Jack, W8TEE

 

On Wednesday, October 17, 2018, 9:15:46 PM EDT, Woody <mailme@...> wrote:

 

 

Thanks for the replies.   The nicer ones I have are 24 PPR.   Might be a
bit fast, but (also) might try one.

73, Woody  KZ4AK
www.albe24.com

On 10/18/2018 0:05, Fast hosts wrote:
> The supplied encoder is 12 PPR just bought one from Digital-key in the US as the supplied one wasn’t functioning P/N PEC11R-4020F-S0012-ND
>> On 18 Oct 2018, at 00:07, Woody <mailme@...> wrote:
>>
>> Hi all,
>>
>> I have some spare shaft encoders from a previous project that I wonder if could be substituted for the one supplied with the uBITX board.
>> So...  does anyone know the pulse per revolution of the supplied encoder?  I guess I could measure it, but if someone has already done it....
>>
>> Thanks,
>> Woody  -  KZ4AK
>> www.albe24.com
>>
>>
>>
>
>


--


Re: uBITX Encoder PPR ??

Jack, W8TEE
 

Opps! I forgot to add that you should make sure you buy encoders with threaded shafts. Many do not have a threaded shaft and it makes it a little more of a hassle to mount them.

Jack, W8TEE

On Wednesday, October 17, 2018, 10:46:27 PM EDT, Jack Purdum via Groups.Io <jjpurdum@...> wrote:


eBay listing 301679318759 shows a 20ppr KY-040 encoder that I have used in many Arduino projects. Buy 10 for about $1 each. I also have a Borne optical encoder that has 60 ppr but costs around $30. Both work fine, but the optical encoders don't have the "detent" feel, which I like, but most do not. Brian Low has an excellent encoder library that works with most encoders on the Arduino or Teensy platform, including those mentioned above: https://github.com/brianlow/Rotary

Jack, W8TEE

On Wednesday, October 17, 2018, 9:15:46 PM EDT, Woody <mailme@...> wrote:


Thanks for the replies.   The nicer ones I have are 24 PPR.   Might be a
bit fast, but (also) might try one.

73, Woody  KZ4AK
www.albe24.com

On 10/18/2018 0:05, Fast hosts wrote:
> The supplied encoder is 12 PPR just bought one from Digital-key in the US as the supplied one wasn’t functioning P/N PEC11R-4020F-S0012-ND
>> On 18 Oct 2018, at 00:07, Woody <mailme@...> wrote:
>>
>> Hi all,
>>
>> I have some spare shaft encoders from a previous project that I wonder if could be substituted for the one supplied with the uBITX board.
>> So...  does anyone know the pulse per revolution of the supplied encoder?  I guess I could measure it, but if someone has already done it....
>>
>> Thanks,
>> Woody  -  KZ4AK
>> www.albe24.com
>>
>>
>>
>
>


--



Re: uBITX Encoder PPR ??

Jack, W8TEE
 

eBay listing 301679318759 shows a 20ppr KY-040 encoder that I have used in many Arduino projects. Buy 10 for about $1 each. I also have a Borne optical encoder that has 60 ppr but costs around $30. Both work fine, but the optical encoders don't have the "detent" feel, which I like, but most do not. Brian Low has an excellent encoder library that works with most encoders on the Arduino or Teensy platform, including those mentioned above: https://github.com/brianlow/Rotary

Jack, W8TEE

On Wednesday, October 17, 2018, 9:15:46 PM EDT, Woody <mailme@...> wrote:


Thanks for the replies.   The nicer ones I have are 24 PPR.   Might be a
bit fast, but (also) might try one.

73, Woody  KZ4AK
www.albe24.com

On 10/18/2018 0:05, Fast hosts wrote:
> The supplied encoder is 12 PPR just bought one from Digital-key in the US as the supplied one wasn’t functioning P/N PEC11R-4020F-S0012-ND
>> On 18 Oct 2018, at 00:07, Woody <mailme@...> wrote:
>>
>> Hi all,
>>
>> I have some spare shaft encoders from a previous project that I wonder if could be substituted for the one supplied with the uBITX board.
>> So...  does anyone know the pulse per revolution of the supplied encoder?  I guess I could measure it, but if someone has already done it....
>>
>> Thanks,
>> Woody  -  KZ4AK
>> www.albe24.com
>>
>>
>>
>
>


--



Re: can't update friemware.. when I install the ch341 driver I get "The drive is successfully Pre-installed in advance" #firmware #ubitx

Jack, W8TEE
 

Did you mean the CH340 driver?

Jack, W8TEE

On Wednesday, October 17, 2018, 9:58:44 PM EDT, Fast hosts <keith@...> wrote:



When i run xloader It says can't open port? in device manager ports section it only shows as a normal port and not as a usb to serial port. I understand that when the CH341 driver installs correctly you just get that message that it is installed correctly not what I get.. anybody any ideas please? want to put Ian's firmware on and get the Nextion display installed 73 M6OLP
--
Keith Baker - Communications technician (retired)

3D Printer (STL) file for Front Panel of Dummy Load Nov, 2018, QST

Jack, W8TEE
 

All:

Al found the file for the front panel cover of the dummy load. It is attached.

Jack, W8TEE

can't update friemware.. when I install the ch341 driver I get "The drive is successfully Pre-installed in advance" #firmware #ubitx

Fast hosts
 


When i run xloader It says can't open port? in device manager ports section it only shows as a normal port and not as a usb to serial port. I understand that when the CH341 driver installs correctly you just get that message that it is installed correctly not what I get.. anybody any ideas please? want to put Ian's firmware on and get the Nextion display installed 73 M6OLP
--
Keith Baker - Communications technician (retired)

Re: uBITX Encoder PPR ??

Woody
 

Thanks for the replies.   The nicer ones I have are 24 PPR.   Might be a bit fast, but (also) might try one.

73, Woody  KZ4AK
www.albe24.com

On 10/18/2018 0:05, Fast hosts wrote:
The supplied encoder is 12 PPR just bought one from Digital-key in the US as the supplied one wasn’t functioning P/N PEC11R-4020F-S0012-ND
On 18 Oct 2018, at 00:07, Woody <mailme@...> wrote:

Hi all,

I have some spare shaft encoders from a previous project that I wonder if could be substituted for the one supplied with the uBITX board.
So... does anyone know the pulse per revolution of the supplied encoder? I guess I could measure it, but if someone has already done it....

Thanks,
Woody - KZ4AK
www.albe24.com



--

Re: uBITX Encoder PPR ??

Fast hosts
 

The supplied encoder is 12 PPR just bought one from Digital-key in the US as the supplied one wasn’t functioning P/N PEC11R-4020F-S0012-ND

On 18 Oct 2018, at 00:07, Woody <mailme@...> wrote:

Hi all,

I have some spare shaft encoders from a previous project that I wonder if could be substituted for the one supplied with the uBITX board.
So... does anyone know the pulse per revolution of the supplied encoder? I guess I could measure it, but if someone has already done it....

Thanks,
Woody - KZ4AK
www.albe24.com


--
Keith Baker - Communications technician (retired)

Re: uBITX Encoder PPR ??

Jim Sheldon
 

Woody, I've used 12, 20 and 24 PPR detentless encoders with decent results. I believe the originals are 20 PPR detentless but not totally sure if they are 20 or 24 PPR.

Jim, W0EB

On Oct 17, 2018, at 6:07 PM, Woody <mailme@...> wrote:

Hi all,

I have some spare shaft encoders from a previous project that I wonder if could be substituted for the one supplied with the uBITX board.
So... does anyone know the pulse per revolution of the supplied encoder? I guess I could measure it, but if someone has already done it....

Thanks,
Woody - KZ4AK
www.albe24.com


uBITX Encoder PPR ??

Woody
 

Hi all,

I have some spare shaft encoders from a previous project that I wonder if could be substituted for the one supplied with the uBITX board.
So...  does anyone know the pulse per revolution of the supplied encoder?  I guess I could measure it, but if someone has already done it....

Thanks,
Woody  -  KZ4AK
www.albe24.com

Re: Simple spur fix

Joe Puma
 

I ordered SMD’s as instructed by Raj. I think he tried that already with the toroids. So far and inductors are the best solution. Correct me if I’m wrong. 

Joe



On Oct 17, 2018, at 6:31 PM, RICHARD <k6kwq@...> wrote:

Has anyone tried remounting the toroids at right angles to each other.  That is what I all ways do and have read no shielding is required.  Could be replacing the toroids with SM devices lowers the Q so much the problem appears to go away.

K6KWQ  Dick

 

Sent from Mail for Windows 10

 


From: BITX20@groups.io <BITX20@groups.io> on behalf of Nick VK4PP <nickpullen@...>
Sent: Wednesday, October 17, 2018 3:21:11 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Simple spur fix
 
Has anyone tried mounting the original inductions from the bottom of the board?
Maybe laying flat if possible?
Better shielding?

Thanks.

Nick VK4PP

Re: Simple spur fix

RICHARD <k6kwq@...>
 

Has anyone tried remounting the toroids at right angles to each other.  That is what I all ways do and have read no shielding is required.  Could be replacing the toroids with SM devices lowers the Q so much the problem appears to go away.

K6KWQ  Dick

 

Sent from Mail for Windows 10

 


From: BITX20@groups.io <BITX20@groups.io> on behalf of Nick VK4PP <nickpullen@...>
Sent: Wednesday, October 17, 2018 3:21:11 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Simple spur fix
 
Has anyone tried mounting the original inductions from the bottom of the board?
Maybe laying flat if possible?
Better shielding?

Thanks.

Nick VK4PP

Re: Harmonics and Relay Replacement

Gary Anderson
 

I have noticed different capacitance datasheet 'specs' for the AXICOM White D2n and the Black D2n*, although the same part number.
The RF characteristics are the same.

Capacitance                                                 D2n (white)                         D2n* (black)

between coil and contacts                            max. 2 pF                           max. 4pF (between contact and coil)

between adjacent contact sets                     max. 1.5 pF                        max. 2pF (between adjacent contacts)

between open contacts                                max. 1 pF                           max. 2pF

RF Characteristics

Isolation at 100 / 900 MHz                          -39.0 dB / -20.7 dB              same

Insertion loss at 100 / 900 MHz                  -0.02 dB / -0.27 dB              same

V.S.W.R. at 100 / 900 MHz                          1.04 / 1.40                          same

Gilles, the MT2 relays spec less Isolation (- 31.8 dB / - 14.2 dB), I assume this is still true at  HF frequencies too.

Rgds,
Gary
AG5TX

Re: Harmonics and Relay Replacement

Arv Evans
 

Giles

I'm not sure yet that the relays are the source of the problem.  They are probably contributors,
but there may be other culprits as well.  I noted your earlier suggestion that we might try
solid-state switching.  That is a valid approach if the relays are proven to be a major source
of problems.  Problem with solid-state switching for RF is that it is a bit complicated if the
RF voltages exceed reverse-bias on the switching elements.  Now I am wondering if the idle
lines to inactive DC relays could or should be grounded with MOSFET switches?  This might
be more effective than just bypassing the relay operating lines for RF.

As Allison has said, part of the problem is overall board layout.  In trying to keep it compact
some decisions may have been made that compromise the situation regarding spurs and
harmonics. 

Arv
_._


On Wed, Oct 17, 2018 at 3:06 PM F1BFU - Fr - 79 <gilles.f1bfu@...> wrote:
Hello Kees, Arv

I am attentive to your discussions on relays. I am not a professional technician so I will definitely ask a silly question. But too bad I start.

Could the relays be replaced by other components (PIN diode, transistor, etc.)?
Can current relays be replaced by AXICOM MT2 relays?

Again, my apologies for disturbing your conversations with naive questions.

73 QRO
Gilles - F1BFU /FR

Le mer. 17 oct. 2018 à 22:27, Arv Evans <arvid.evans@...> a écrit :
Kees

Some possible areas to look into:
  • Are there resonances in the relay activation path when (activated, or inactive)?
    Thinking about permeability change in relay coils when current is flowing?

  • What is the self-resonant frequency of the relay coils when activated and when
    inactive?

  • Is there any RF on the relay coils during transmit mode (RF Detector or O-scope)?
    Seems there should be none...?

  • How much RF, and at what frequency, is there on the toroids, other than the ones
    that have been activated for a particular band?

  • What happens to the harmonics and spurs when all but the active filter is removed
    from the PCB?

  • L-31 is very close to an RF PA heat sink.  Is it picking up unwanted RF?  Is it picking
    up "unbalanced RF" because it is coupling to only one side of the RF PA output?

  • Is imbalance between RF PA MOSFETs causing harmonic or spurious output?

  • If input to the RF PA is clean, is it still clean if the RF PA output is terminated in a
    purely resistive dummy load (without any LPFs connected)?

  • If an LPF is connected by short jumpers instead of via the relay, is output clean
    or unclean?  Is it clean if the relay activation lead is at ground instead of active?

  • There are some who are building their own modular and non-modular versions
    of the uBITX.  I wonder how they are doing with respect to harmonics and spurs?
Looking back over some of the suggested improvements it seems that there may have
been some eureka moments that might have been published before they were well
thought out.  Some of Allison's posts might indicate that we have been focusing on and
treating the symptoms instead of the source problem. 

It is probably unfair that I comment when I do not have the test equipment, skills, or
available time to perform in-depth tests.  But given the situation, talk is about all I
can do.      8-(  

Arv
_._


On Wed, Oct 17, 2018 at 1:38 PM Kees T <windy10605@...> wrote:
You may have seen all the discussion on using AXICOM relays. Until that is flattened and I understand the "why" I am refunding your money for the K5BCQ LPF board kits which were ordered as I continue to investigate further.

Attached is a picture of the AXICOM V23105-A5403-A201 relays just received from Mouser. You can see that there are some physical differences between them and the previous AXICOM relay pictures posted (coil spacing to contacts, and ?). 

A good friend of mine, Glen, has donated an unmodified uBITX board for my future testing. Thank you Glen.

 
73 Kees K5BCQ


--
Gilles - F1BFU/FR

Re: Simple spur fix

Nick VK4PP
 

Has anyone tried mounting the original inductions from the bottom of the board?
Maybe laying flat if possible?
Better shielding?

Thanks.

Nick VK4PP

Re: stl for dlwattmeter

Donald <donwestpwl@...>
 

Thank you.

On 10/17/2018 10:02 AM, Jack Purdum via Groups.Io wrote:
It's a quart paint can that I bought at Lowes. I bought the mineral oil at Walgreens, but I'm sure any drug store would carry it. As far as I know, the type of mineral oil doesn't matter. I simply bought the cheapest I could find.

Jack, W8TEE

 

Re: Simple spur fix

Ripley
 

Gary,

Thank you for pointing that out to me. I see that now.

73s
Ripley


The words are mine but this iPad does what it will with them.

On Oct 17, 2018, at 5:18 PM, Gary Anderson <gary.ag5tx@...> wrote:

Ripley, stay mindful of the audio signal path through the K3 relay that also switches antenna for RX, TX.
This is a common reported / resolved audio problem.
Implemented in conjunction with the 'pop' fix, the audio is no longer routed to /switched using this relay.

Rgds,
Gary
AG5TX

Re: Harmonics and Relay Replacement

Kees T
 

Gilles, the only naive questions are the ones not asked .....or something like that ;o)

Arv, we (AQRP Wed lunch guys) were speculating that the Constant K filter design used on the uBITX was suspect in that it has terrible out of band matching and the resultant reflections due to poor VSWR might be the cause of the problem .....and that the AXICOM relays "happen to correct" some of that problem. One of the guys checked the Smith Chart results using the original uBITX relays against the AXICOM relays I had purchased for a given uBITX filter design. To his (and my) surprise they are nearly identical. Now, this is using a separate single LPF test fixture board with relays.

We're trying to find an industry standard test fixture for testing relay RF isolation.

73 Kees K5BCQ

Re: Simple spur fix

Gary Anderson
 

Ripley, stay mindful of the audio signal path through the K3 relay that also switches antenna for RX, TX.
This is a common reported / resolved audio problem.
Implemented in conjunction with the 'pop' fix, the audio is no longer routed to /switched using this relay.

Rgds,
Gary
AG5TX

Re: Harmonics and Relay Replacement

F1BFU - Fr - 79
 

Hello Kees, Arv

I am attentive to your discussions on relays. I am not a professional technician so I will definitely ask a silly question. But too bad I start.

Could the relays be replaced by other components (PIN diode, transistor, etc.)?
Can current relays be replaced by AXICOM MT2 relays?

Again, my apologies for disturbing your conversations with naive questions.

73 QRO
Gilles - F1BFU /FR

Le mer. 17 oct. 2018 à 22:27, Arv Evans <arvid.evans@...> a écrit :
Kees

Some possible areas to look into:
  • Are there resonances in the relay activation path when (activated, or inactive)?
    Thinking about permeability change in relay coils when current is flowing?

  • What is the self-resonant frequency of the relay coils when activated and when
    inactive?

  • Is there any RF on the relay coils during transmit mode (RF Detector or O-scope)?
    Seems there should be none...?

  • How much RF, and at what frequency, is there on the toroids, other than the ones
    that have been activated for a particular band?

  • What happens to the harmonics and spurs when all but the active filter is removed
    from the PCB?

  • L-31 is very close to an RF PA heat sink.  Is it picking up unwanted RF?  Is it picking
    up "unbalanced RF" because it is coupling to only one side of the RF PA output?

  • Is imbalance between RF PA MOSFETs causing harmonic or spurious output?

  • If input to the RF PA is clean, is it still clean if the RF PA output is terminated in a
    purely resistive dummy load (without any LPFs connected)?

  • If an LPF is connected by short jumpers instead of via the relay, is output clean
    or unclean?  Is it clean if the relay activation lead is at ground instead of active?

  • There are some who are building their own modular and non-modular versions
    of the uBITX.  I wonder how they are doing with respect to harmonics and spurs?
Looking back over some of the suggested improvements it seems that there may have
been some eureka moments that might have been published before they were well
thought out.  Some of Allison's posts might indicate that we have been focusing on and
treating the symptoms instead of the source problem. 

It is probably unfair that I comment when I do not have the test equipment, skills, or
available time to perform in-depth tests.  But given the situation, talk is about all I
can do.      8-(  

Arv
_._


On Wed, Oct 17, 2018 at 1:38 PM Kees T <windy10605@...> wrote:
You may have seen all the discussion on using AXICOM relays. Until that is flattened and I understand the "why" I am refunding your money for the K5BCQ LPF board kits which were ordered as I continue to investigate further.

Attached is a picture of the AXICOM V23105-A5403-A201 relays just received from Mouser. You can see that there are some physical differences between them and the previous AXICOM relay pictures posted (coil spacing to contacts, and ?). 

A good friend of mine, Glen, has donated an unmodified uBITX board for my future testing. Thank you Glen.

 
73 Kees K5BCQ



--
Gilles - F1BFU/FR