Date   
Re: THANK YOU K5BCQ

Mark M
 

Let me add my thanks as well. I received the kits yesterday and am quite impressed. I was expecting only a set of parts so was pleased to also get the schematic, etc...even a little piece of double-sticky foam tape. Now to see if I can assemble them...those surface mount parts are really tiny.

Re: THANK YOU K5BCQ

Michael Walker
 

Hi All

With all the emails, I must have missed the instructions on how to order the AGC board.

Can someone share them with me?

many 73, Mike va3mw


On Fri, Jun 8, 2018 at 4:17 PM, Mark M <junquemaile@...> wrote:
Let me add my thanks as well. I received the kits yesterday and am quite impressed. I was expecting only a set of parts so was pleased to also get the schematic, etc...even a little piece of double-sticky foam tape. Now to see if I can assemble them...those surface mount parts are really tiny.


Re: THANK YOU K5BCQ

Ken
 

Look in the K5BCQ folder in the Files section.

73

ken VA3ABN

On Fri, Jun 8, 2018 at 4:21 PM, Michael Walker <va3mw@...> wrote:
Hi All

With all the emails, I must have missed the instructions on how to order the AGC board.

Can someone share them with me?

many 73, Mike va3mw


On Fri, Jun 8, 2018 at 4:17 PM, Mark M <junquemaile@...> wrote:
Let me add my thanks as well. I received the kits yesterday and am quite impressed. I was expecting only a set of parts so was pleased to also get the schematic, etc...even a little piece of double-sticky foam tape. Now to see if I can assemble them...those surface mount parts are really tiny.



Re: K5BCQ kits in BITX40 #bitx40

Kees T
 

I am sending the kits out with 1 AGC kit and 1 Click kit per regular #10 envelope with the $0.71 "Non Machinable" USPS stamp. If you ordered 2 of each, Im sending 2 envelopes, if you ordered 3 of each, I'm sending 3 envelopes, if you ordered more or it's a DX order, I'm sending it as a package.  As far as USPS turn around times .....I have no idea.

73 Kees K5BCQ

Re: Spurs for Dummies? #ubitx-help

ajparent1/KB1GMX <kb1gmx@...>
 

Ideally you would like to keep the spur from getting to the antenna port.

21.2 to 21.45mhz practical filter would be bandpass (the spur is 23.8 to 23.55mhz)

24.99mhz (12M)  a really good high passas the spur is 20.1mhz

28mhz practical filter is a high pass with a cut off of 23mhz.

If the high pass filter was really good 12 and 10M could be the same filter.
However I tried a 9th order butterworth and it was not enough for 12 and 10 but enough for 10 alone.

NOTE: For CW none of this is needed. 

For digital using SSB you need filters or watched the levels
as its still using SSB mode.

Allison

Re: Spurs for Dummies? #ubitx-help

davedt1e@...
 

Wow!...All the feedback here has exceeded my expectations.

Alyson,  I'm truly impressed that you were able to "Dumb" this down to an understandable level.  I've learned quite a few things in this thread that have been pestering me for a long time.

I'll consider trying a filter,  but not until I figure out how to monitor for the spurs. What's the point unless I can confirm that it's working, right?!  But I won't pester you all with that right now.  I'm sure the answer to that is somewhere on the board.

I'll keep watching for a consensus on the issue.

Thanks to everyone!

Maybe some other noobs will benefit  from this as well.

David

Re: Spurs for Dummies? #ubitx-help

ajparent1/KB1GMX <kb1gmx@...>
 

I hate the term dumb it down, I used plain english and try to use enough technical
language to elevate people.  Works better and it s kindness to them.

If it pesters you ask!  I believe the rule is there are no dumb questions and people 
are seeking information they need.

Not easy to monitor the spurs.  I use a spectrum analyzer, the ideal tool. In the past I
used a receiver with known calibration (feed signal and note the Smeter response).
Its a slower process and awkward but worked.  Have to think of a way to get a
handle on that for everyone.  I think the Dbv-T usb receiver and a upconverter for
HF is  enough cheap hardware for that as an opener (you need a fixture consisting
of power attenuator and instruction how to do all that).

Allison

Re: PTT Question

Alex KA3BQE
 

On Fri, Jun 1, 2018 at 11:52 am, Tim Gorman wrote:
max9814
How would one wire this up for the uBITX? 

Re: Spurs for Dummies? #ubitx-help

Jerry Gaffke
 

I had meant to include this link:
    http://www.kitsandparts.com/univbpfilter.php

Allison's recent post suggests a low pass for operation on 10m.
Makes sense,as it's would require a wide bandwith if bandpass.

This could be an appropriate filter for 15m however.
Looks to me like it would handle 10W just fine.

Jerry


On Fri, Jun 8, 2018 at 12:56 pm, Jerry Gaffke wrote:
Here's a starting point, using T50-10 toroids for the transformers,
you can probably wind the 0.59uH inductor on a T50-10 also.
The kit is no longer availalable, but Diz will sell you the toroids and wire and caps, 
maybe give some advice too.
There may be other such kits out there, but still in production.

Solder it up on a scrap of PC board, install it in line with the antenna coax,
adjust the caps or maximum power into a dummy load.
That's a sharp filter, only a few hundred khz wide on 30m, so tune
it up for the part of the band you are interested in.

I haven't done this, I may have gotten something wrong here.

On 15 meters (21mhz), the spur is at 45-21 = 24mhz.
That's close in, needs a fairly tight bandpass (or lowpass, in this case)  filter to take that out.
 

Re: Spurs for Dummies? #ubitx-help

Jerry Gaffke
 

Gaaa!
Should be highpass for 10m, as Allison stated.
If you want to remove that spur


On Fri, Jun 8, 2018 at 03:31 pm, Jerry Gaffke wrote:
Allison's recent post suggests a low pass for operation on 10m.

Re: Spurs for Dummies? #ubitx-help

ajparent1/KB1GMX <kb1gmx@...>
 

Jerry,

Uhm, that's high pass.  We are trying to kill a spur at 16-17mhz give or take
for 10M band and for 21mhz its a 24mhz spur.  I'll leave out 12M for the moment.

I ran one using ELSIE (tonne software free version) for 7th order high pass with
26mhz cutoff and its marginal.  Double tuned band pass with bandwidth of 1.5mhz
for 10m link input and output worked well.  Problem is can we tolerate 2-3db
insertion loss between the 4 pole low pass and the input to Q90.

Allison

Re: CAT Port For BITX40

Felix Lopez
 

I just stumbled on this thread while searching for a way of implementing CAT control using a Raspberry pi v3 with the bitx40. Is this feasible and how would I start to go about this? Thank you for any help.
Felix,
KD0LMR

My personal Nextion Tips and working 2.8" time demo with enhanced RTC in Files section #ubitx

Bo Barry <bobarr@...>
 

Wow. I can fly! I can fly! as they say. 3 days of hard work, but at 78 it does take lots longer.
Short term memory shot, so I'm gathering my learnings in a file. 
Comments additions greatly appreciated.
I'll be connected to my ubitx in no time. (using Ian's fine software of course)


Nextion Tips     6/7/18  W4GHV
 
RTC    use .txt not .val    use:   cov rtc0,t0.txt,0    etc for other RTCx
       put those lines in a TIMER
   
   
Resizing
Set display to 7"
Open image, move items close together at the top right of screen
Export images larger than desired display size and save them,
Delete the big images and save new file with a different name.
Use xxxx program to shrink images to desired size and save.
Open modified HMI and add new images. Move items to fit.
 
Debugging
Handy but not figured out yet. Connection to the display does nothing
Codes are displayed in the simulator window however.
 
The debug statements in an Arduino file do not print to the Monitor.
Debug is on and I'm using a Mega2560 with additional comm port which works

Demo in Files

Re: RF power chain mods and improvements..

Ion Petroianu, VA3NOI
 

Jerry,
Looking at the data sheet seems to indicate that Ft=360MHz is achievable at 200 mA current. It might not work in our application.
--
Ion

VA3NOI

New file uploaded to BITX20@groups.io

BITX20@groups.io Notification <BITX20+notification@...>
 

Hello,

This email message is a notification to let you know that a file has been uploaded to the Files area of the BITX20@groups.io group.

File: gage_time_bo.HMI

Uploaded By: Bo Barry

Description:
2.8" enhanced simple gauge and time display from RTC Bo W4GHV since '54

You can access this file at the URL:
https://groups.io/g/BITX20/files/gage_time_bo.HMI

Cheers,
The Groups.io Team

Re: CAT Control

Dennis
 

Loading up a new driver opened up the port for me - assigned itself COM7. So thanks for those links.

 

However, I still can’t get CAT to work with wsjt-x. 

 

73, Dennis

W7DRW

New file uploaded to BITX20@groups.io

BITX20@groups.io Notification <BITX20+notification@...>
 

Hello,

This email message is a notification to let you know that a file has been uploaded to the Files area of the BITX20@groups.io group.

File: gage_time_bo.HMI

Uploaded By: Bo Barry

Description:
2.8" enhanced simple gauge and time display from RTC Bo W4GHV since '54

You can access this file at the URL:
https://groups.io/g/BITX20/files/gage_time_bo.HMI

Cheers,
The Groups.io Team

Re: Spurs for Dummies? #ubitx-help

Arv Evans
 

Once you now what the probable frequency of spurs it is relatively easy to monitor
them with another receiver.  Even something as simple as the Pixie circuit will work
if you provide stability and accuracy with a DDS or Si5351 as its local oscillator. 
Well shielded auxiliary receiving devices can be calibrated by inserting a step
attenuator in the antenna input and measuring audio beat note level of the output. 
This could be the basis of a poor-man's spectrum analyzer. 

Arv
_._


On Fri, Jun 8, 2018 at 3:04 PM <davedt1e@...> wrote:
Wow!...All the feedback here has exceeded my expectations.

Alyson,  I'm truly impressed that you were able to "Dumb" this down to an understandable level.  I've learned quite a few things in this thread that have been pestering me for a long time.

I'll consider trying a filter,  but not until I figure out how to monitor for the spurs. What's the point unless I can confirm that it's working, right?!  But I won't pester you all with that right now.  I'm sure the answer to that is somewhere on the board.

I'll keep watching for a consensus on the issue.

Thanks to everyone!

Maybe some other noobs will benefit  from this as well.

David

Re: My personal Nextion Tips and working 2.8" time demo with enhanced RTC in Files section #ubitx

Ian Lee
 

Bo

I simulated the file you uploaded. and It worked perfectly. 
It would be nice to apply it to SWR meter or Power meter.
If use RTC, we can send WSPR more easily
I was wondering how to align Guage's central axis. You solved it briefly.
I made the digitized signal level display like analog, Probably applicable to uBITX

The following figure shows the file you uploaded in Nextion Editor.
I did not have a Nextion LCD to support RTC, so I could only run it in the Nextion Editor.



Ian KD8CEC

2018-06-09 7:51 GMT+09:00 Bo Barry <bobarr@...>:

Wow. I can fly! I can fly! as they say. 3 days of hard work, but at 78 it does take lots longer.
Short term memory shot, so I'm gathering my learnings in a file. 
Comments additions greatly appreciated.
I'll be connected to my ubitx in no time. (using Ian's fine software of course)


Nextion Tips     6/7/18  W4GHV
 
RTC    use .txt not .val    use:   cov rtc0,t0.txt,0    etc for other RTCx
       put those lines in a TIMER
   
   
Resizing
Set display to 7"
Open image, move items close together at the top right of screen
Export images larger than desired display size and save them,
Delete the big images and save new file with a different name.
Use xxxx program to shrink images to desired size and save.
Open modified HMI and add new images. Move items to fit.
 
Debugging
Handy but not figured out yet. Connection to the display does nothing
Codes are displayed in the simulator window however.
 
The debug statements in an Arduino file do not print to the Monitor.
Debug is on and I'm using a Mega2560 with additional comm port which works

Demo in Files



--
Best 73
KD8CEC / Ph.D ian lee
kd8cec@...
www.hamskey.com (my blog)

Re: RF power chain mods and improvements..

ajparent1/KB1GMX <kb1gmx@...>
 

Ray,

Ideally that a good way to go but the issue is even if the spur is 50DB down and you now at 100W (60DBM)
That means the spur is 10 milliwatts.  Filtering is a must then.
The problem is it may without checking be only 40db down and amp'ed up 10 100W that is 100milliwatts and
that is not a good thing as there are other rules that kick in.

Allison