Date   
Nice to know ..... my Raspberry switch

Johan Holstein
 

Re: SSB exciter with digital audio phasing

Glenn
 

There's an interesting series of youtube videos on a Phasing rig here https://www.youtube.com/watch?v=Xg-rBwnkkBc
The link is his last current video, there are several in   his series.

Charlie is using a Teensy to do the grunt work I understand.

vk3pe

Re: Nearly non-existent output power, no mod

Ted
 

Raj,

I'll take a look at D1 & D2.


Mark,

I don't recall the source though I've picked up two different batches off the Bay over time. I know eBay sources are to be distrusted, though the ones I've used so far at least work.

-------------------

The curious thing is that the heat sinks are getting plenty hot. Something's making power but where is it going?  I now get maybe a watt out on 80, 40, and 30; up to maybe 2 on 20, then about nothing on 17 and 15.  The LPF relays get coil voltage seemingly [only] when they're supposed to have it.

I swapped out K3 (t/r relay) out of frustration, so at least it's now color-coordinated with the rest of the Axion blocks in that row :)   

I'll look at Raj's idea and come back.


Thanks, all.

Ted
k3rta

Re: Nearly non-existent output power, no mod

 

Regardless,

The problem wouldn't be with the mic element as Ted gets almost no power out on CW either.

73,


Mark.

Re: Raduino 4 Line Single Sided PCB boards

efkleas@...
 

Hi
I would like to try this pcb. Do you have sprintlayout file?
Thanks in advance
SV1CRN

Re: high pitched wine on 80 and 40 M

_Dave_ AD0B
 

I had that whine occur on a V4 uBITX that I purchased used. It was also fairly deaf.  The solution was to change the bfo frequency to stock. It was about 2 kc off. It works well now. 
--
73
Dave
k0mbt
http://veloliner.com/ham/k0mbtkey.pdf

Re: Nearly non-existent output power, no mod

_Dave_ AD0B
 

iz-ooz
I have not looked at the values of the feed resistors but they are stock and the radios have been picked up from various sources.

I have replaced the elements from various sources as well. Some come from used telephones, others were purchased on ebay for cheap. I think I got 7 of them and have only 2 left. None of the original mic elements are still working. 

Perhaps there is something about my grounding or other issue that affects the mics. Might be a topic for another thread. 
--
73
Dave
k0mbt
http://veloliner.com/ham/k0mbtkey.pdf

Re: Nearly non-existent output power, no mod

iz oos
 

That's very strange you changed so many mic elements. I haven't used that as much as you but I thought an electret could last decades. Are you sure the resistors supplying the elements have the correct value?


Il 30/ago/2019 15:27, "_Dave_ K0MBT" <davesters@...> ha scritto:
The times that I have lost ssb output Ted, the mic element has gone bad. They seem very fragile but work good when they work. Probably gone though half a dozen in two years of running 4 uBITX and one BITX40 radios.

Will see just what you did a bump in the power when keyed. 
--
73
Dave
k0mbt
http://veloliner.com/ham/k0mbtkey.pdf

Re: Nearly non-existent output power, no mod

_Dave_ AD0B
 

The times that I have lost ssb output Ted, the mic element has gone bad. They seem very fragile but work good when they work. Probably gone though half a dozen in two years of running 4 uBITX and one BITX40 radios.

Will see just what you did a bump in the power when keyed. 
--
73
Dave
k0mbt
http://veloliner.com/ham/k0mbtkey.pdf

Re: SSB exciter with digital audio phasing

Miguel Angelo Bartie
 

Hi

I am with problems in my web site.
So I post the SSB exciter in the group files
https://groups.io/g/BITX20/files/py2ohh

dspicssb.rar

This exciter replaces a PC in SDR transmitters.
I make a hex file for the dspic ...using mplab and pickit3 ...take care about the dspic ...it has a lot of this family name look at the same name. I am working to write a new page that I am explain how to program the dspic.

73 from py2ohh miguel

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: dspicssb.rar

Uploaded By: Miguel Angelo Bartie

Description:
SSB exiter HF to 80m with digital phase shift ...replace a PC in SDR transmitter.

You can access this file at the URL:
https://groups.io/g/BITX20/files/py2ohh/dspicssb.rar

Cheers,
The Groups.io Team

Re: SSB exciter with digital audio phasing

Lawrence Galea
 

This is his old site.
http://www.geocities.ws/py2ohh/  
There seems to be a problem with his new site and also with some links on his old site
Regards
Lawrence

On Fri, Aug 30, 2019 at 6:25 AM Sandeep Lohia <sandeeplohia12@...> wrote:


On Thu 29 Aug, 2019, 12:13 PM Ashhar Farhan, <farhanbox@...> wrote:
the link is not opening miguel, can you recheck the url?








even I made one of his project :
& still have some spare PCB




- f

On Thu, Aug 29, 2019 at 3:11 AM Miguel Angelo Bartie via Groups.Io <py2ohh=yahoo.com.br@groups.io> wrote:
hi 

PSN SSB exciter with digital audio phasing ... with DSpic33FJ64gp802 and Max2452 no tune SSB
Based on the work of Japanese hams.(JF3HZB Uebo  & JA2NKD Ryuu & others). 

http://py2ohh.w2c.com.br/
(in portuguese)

73 from py2ohh miguel

Re: SSB exciter with digital audio phasing

Nigel G4ZAL
 

Sandeep,
How much for one of your spare JA2NKD analyzer PCB?
I just finished breadboarding JA2NKD's analyzer and it works good.

My email is OK on here and on QRZ.com

Sorry to the OP for going off topic...

Nigel - G4ZAL


On Fri, Aug 30, 2019 at 05:25 AM, Sandeep Lohia wrote:

even I made one of his project :
& still have some spare PCB
 
 

Re: SSB exciter with digital audio phasing

Sandeep Lohia
 



On Thu 29 Aug, 2019, 12:13 PM Ashhar Farhan, <farhanbox@...> wrote:
the link is not opening miguel, can you recheck the url?








even I made one of his project :
& still have some spare PCB




- f

On Thu, Aug 29, 2019 at 3:11 AM Miguel Angelo Bartie via Groups.Io <py2ohh=yahoo.com.br@groups.io> wrote:
hi 

PSN SSB exciter with digital audio phasing ... with DSpic33FJ64gp802 and Max2452 no tune SSB
Based on the work of Japanese hams.(JF3HZB Uebo  & JA2NKD Ryuu & others). 

http://py2ohh.w2c.com.br/
(in portuguese)

73 from py2ohh miguel

Re: Nearly non-existent output power, no mod

Sam Tedesco
 

Ted...make sure the heat sinks on the finals aren't touching any of the coils.

Re: Project : Ubitx go box with batteries (topic will be updated upon works done)

Adrien F4IJA <adrien.grelet@...>
 

OK, seems quite similar. I'll test it before !

Re: Project : Ubitx go box with batteries (topic will be updated upon works done)

Vince Vielhaber
 

The one I got also measured current and had a bezel. In the pic at this listing it's the "Blue + Red".

https://www.ebay.com/itm/173133930221

I ended up with a useless hole in the panel, not a big deal tho, I was experimenting with the panel layout so I just put a piece of tape over the hole.

Vince.

On 08/29/2019 02:37 PM, Adrien F4IJA wrote:
BTW : do you have the reference of the one who caused you problem? I
didn't answer your question : it's an add-on like this one

https://fr.aliexpress.com/item/33051924559.html

Re: Relay Board Mod for V3/V4 Harmonics

 

One relay board left on the pre-orders!

I will have about 20-30 more once the pre-orders are filled.

Looks like this may become a stock item for a while.

73

Thanks all!
--
David

 N8DAH
Kit-Projects.com

Shop is open!

Re: Project : Ubitx go box with batteries (topic will be updated upon works done)

Adrien F4IJA <adrien.grelet@...>
 

BTW : do you have the reference of the one who caused you problem? I didn't answer your question : it's an add-on like this one

https://fr.aliexpress.com/item/33051924559.html

Re: Current v5 ubitx fixes adequate? Is there a thread about v4 fixes?

walt hodges
 

Can’t access web server. Received 
multiple error messages.