Date   
Re: Nearly non-existent output power, no mod

barry halterman
 

The nano had a bad output pin that selects txa, b or c  relay driver. I don't recall which one but it kept one filter always selected, like if on 20 meters the 80 meter filter was constantly inline. Thus, little to no power from the finals for anything above 80 meters. IC for the finals was normal and they got hot but no power out.
Replacing the nano corrected the issue.
Barry

On Sat, Aug 31, 2019, 11:53 PM Mark - N7EKU <n7eku@...> wrote:
Hi Barry,

Why was your nano selecting the wrong filter?  This doesn't seem like a typical problem -- at least I've not seen a lot of such reports here.  Were you using factory firmware, or something else?

73,


Mark.

Re: UBitx v5 Not Saving Calibration or BFO adjustments with CEC v 1.20 Nextion

Herman Scheper
 

Do you use the ‘manager’software…?

 

Van: BITX20@groups.io <BITX20@groups.io> Namens markix88@...
Verzonden: zondag 1 september 2019 15:45
Aan: BITX20@groups.io
Onderwerp: Re: [BITX20] UBitx v5 Not Saving Calibration or BFO adjustments with CEC v 1.20 Nextion

 

Same problem here, same software. Ubitx v5 with nextion 3.5, any suggests? Can't save master cal value, Thank you

Nextion Diisplay Fonts

Paul Galburt - K2AYZ
 

Has any worked out a way to display a properly kerned variable width font on the Nextion display. The standard font spaces poorly and generally results in using a smaller size than I'd like.

Thanks and 73,
Paul K2AYZ

Re: UBitx v5 Not Saving Calibration or BFO adjustments with CEC v 1.20 Nextion

markix88@...
 

Same problem here, same software. Ubitx v5 with nextion 3.5, any suggests? Can't save master cal value, Thank you

New wiring diagram version

 

Hi all,

Just FYI, I added a higher resolution SVG version of the ubitx wiring diagram to the wiki assembly page.  I always had a bit of trouble reading the existing version, even if I used the larger size PNG image; so I added this SVG version in case anyone else had trouble like I did.

There's such a lot of detailed information on the very nice wiring diagram that W4RJP did!

73 and cheers!


Mark.

Re: SSB exciter with digital audio phasing

Nigel G4ZAL
 

Hi Sandeep,

I have sent an email to your QRZ.com page email address as listed there.

Regds,

Nigel

Re: high pitched wine on 80 and 40 M

jfein2000@...
 

Thanks Dave and John.  Yes I think the BFO was the issue. Actually got onto that  a few days ago.    Also found if I turned on the attenuator and it went away.  Reset the BFO and seems ok now.  I do notice that it is not very sensitive on receive compared to any of my other radios.  Wonder if that is just how it is? 

cheers Jeff VK3GMO
 

 

 

Re: Nearly non-existent output power, no mod

 

Hi Barry,

Why was your nano selecting the wrong filter?  This doesn't seem like a typical problem -- at least I've not seen a lot of such reports here.  Were you using factory firmware, or something else?

73,


Mark.

Re: [QRPp-1Watters] My 5W30 is Lonely

Jack, W8TEE
 

As fate would have it, I got an email from HF today and the case is on sale:

Inline image

Jack, W8TEE


On Saturday, August 31, 2019, 10:30:23 AM EDT, Jack Purdum <jjpurdum@...> wrote:


I've built the new 5 Watter that Diz is selling and wrote an article on it which should be coming out in CQ in Nov (I think?). The thing I noticed most about the rig is how quiet it is compared to some other QRP rigs. These photos show the board and how I mounted it:

Inline image
Note that there are 4 SMD's on the board, 12 cores, and a bazillion bypass caps. I "doubled" the heat sinks just because I had them laying around.
Inline image

I put it in an Apache case from Harbor Freight ($10 on sale) which is water tight. Because I bring all connections out through the top panel, there are no holes in the case so when I drop it in the lake, I should be able to retrieve it before it takes on any water. Also, I could probably drive over it with my car...it's pretty rugged. By cutting the foam inserts that come with it, I can pad paddles, ear buds, and antenna in the case. When I get around to a custom battery pack, that should fit in, too.

Jack, W8TEE


On Saturday, August 31, 2019, 9:40:21 AM EDT, Colin Evans <colin.evans2@...> wrote:


Hi Curt,

I built 1W40 s/n#939 early last year. I found the trimmer caps were very jumpy during TX alignment and swapped them out. With the new trimmers, TX alignment was much easier. I struggled with the TX/RX shift, it took some work to get right. I've had a couple of contacts on the 1W40 but I'm still not confident that it's 100%.

I built a bare bones 5 watt amp from Diz, I left out the VSWR circuitry, just put in a low pass filter. Unfortunately I didn't bridge the output from the amp to the low pass filter - the instructions at the time assumed that the VSWR circuit would be in place. Diz later amended the instructions after I mentioned my mishap. Upon first fire up, the amp popped both of the PA transistors instantly. I couldn't find replacement transistors over this side of the pond, so I bought a pack of 10 transistors from Diz. To make the shipping cost easier to swallow, I opted to buy a 1W30 kit at the same time.

The 5 watt amp works nicely now that the output is properly connected, it's permanently connected to my 1W40.

The 1W30 kit was in storage as I moved QTH last October. I've now got a purpose built shack at the new QTH, so a few weeks ago I started building the 1W30. Again, when it came to TX alignment, I found that the trimmers were very jumpy, it was very hard to find the peaks. I still had some trimmers left from the 1W40 build, some I put them in to the 1W30 - alignment was then easy.

I've had 1 QSO on the 1W30 so far, just as a PCB on the bench, it seems to work fine. I'm currently home brewing a case, although yesterday I broke the mandrel for my nut riveter, so I'm waiting for the mail man to bring me another. I use rivnuts to hold my cases together neatly. I'm hoping to use the 1W30 barefoot for SOTA, so it needs to be in a decent case.

So, that's the update from me, I have 2 rigs, #939 & #979. I have it in mind to put the 1W40/5W on air soon, it's built into a wooden box, paraset style with EFHW tuner, I need to modify it a bit to get at the 50R unbalanced output, then I will be able to hook it up to the shack antenna.

73,

Colin,
M1BUU
IO84
Yorkshire

On Sat, 31 Aug 2019, 13:52 Curt, <rhulett1@...> wrote:

Am having some success with the 5W30, but haven’t seen any 1W30 or 5W30 post QRV.  Hope maybe some others will become active soon.  I try to post on the QRV page and generally near 10.118-10.120.

 

Curt KB5JO

 

Sent from Mail for Windows 10

 


*** Manage your QRPp@... options at http://1watters.com/mailman/listinfo/qrpp_1watters.com ***

Fw: [BITX20] Nearly non-existent output power, no mod

Ted
 



----- Forwarded Message -----
From: "k3rta@..." <k3rta@...>
To: "BITX20@groups.io" <BITX20@groups.io>
Cc:
Sent: Sat, Aug 31, 2019 at 21:33
Subject: Re: [BITX20] Nearly non-existent output power, no mod



On Sat, Aug 31, 2019 at 9:22, barry halterman
<kthreebo@...> wrote:
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

Ted
 




On Sat, Aug 31, 2019 at 9:22, barry halterman
<kthreebo@...> wrote:
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

.

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