Date   
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Ted
 



Re: SSB exciter with digital audio phasing

Sandeep Lohia
 



On Fri 30 Aug, 2019, 12:39 PM Nigel G4ZAL, <nigel@...> wrote:

Sandeep,
How much for one of your spare JA2NKD analyzer PCB?


Here, I distributed most as free gift...
& to those who insist...
 in approx $ 1/- each 
+ shipping/packaging...

some modifications have been made by me in both analogue and digital part...
 2 outputs of DDS output have been combined for 50 ohm out...
& as to cancel some harmo, if any...

my PCB also has provision for external high Q 30 MHz LPF, beyond this is not my frequency of interest...

SNA is 100% functional, modular basis, & all issues fixed...
& has numerous functions :

unknown Ferrite quality of Torroid test, 
Dip Meter, 
SWR test, 
BJT's FT, 
RF power Meter, 
BPF, LPF , ladder filter,
can measure till -80dBM.
Coax velocity & many many other functions...

in details, those needed for brewing...
more technical discussion can be done in Telegram here :

PM me your address... Nigel
HAPPY HOMEBREWING 🙏🏻 73's



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: Nearly non-existent output power, no mod

barry halterman
 

You might have an issue with your nano not selecting the appropriate filter, i.e., one filter is always selected regardless of the band. Check the relay drivers to verify the correct band is selected. 
I had a similar problem with my V4 board, with exactly the same condition you described.
Barry
K3Bo

On Sat, Aug 31, 2019, 2:07 AM Mark - N7EKU <n7eku@...> wrote:
Hi,

I would bet it's the finals. Order some from a reputable company e.g. mouser, arrow, or digikey. They get hot because the drive is turning the on, but they can't make RF efficiently so not much comes out. 

73,


Mark

Re: Nearly non-existent output power, no mod

 

Hi,

I would bet it's the finals. Order some from a reputable company e.g. mouser, arrow, or digikey. They get hot because the drive is turning the on, but they can't make RF efficiently so not much comes out. 

73,


Mark

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 !