Date   
Re: Knob "Momentum" #ubitx #v6

Reed N
 

Hi Bert,

I messed around with things a bit more tonight, but while I agree that it feels a bit too eager to jump in some cases, I also haven't figured out a better algorithm yet. If you do happen to change the code and come across something that "feels right" while still allowing for quick band changes, PLEASE let me know!


Reed

Enhancement to #v6

Andy_501
 

Anybody with experience implementing CAT rig control have suggestions on best way to incorporate att device to work as modem embedded in uBITxV6 chassis. To enable more digi modes.

Card was only $15

cheers

Re: IRF510 insulation question #v5

ajparent1/kb1gmx
 

Without the long story...

A vendor did that using plastic (Nylon, later Delrin) screws and it didn't work out well.

Seems the screws would get warm and stretch allowing the mounted device to
loose solid contact and get very much hotter then the screw would melt and fail.
The device aware of its over heated condition would notify the user by releasing
smoke and ceasing operation, promptly and permanently.

The field kit included new transistor, metal screw, nut and a fiber shoulder washer.
The instructions admonished the service person to use the parts and directed,
or else, in bold print.

Allison
---------------------------------
No direct email, it goes to bit bucket due address harvesting in groups.IO

Re: : Thank you!

MadRadioModder
 

Which “ham friendly” islands are you going to?

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Jack, W8TEE via Groups.Io
Sent: Thursday, January 23, 2020 6:19 PM
To: BITX20@groups.io
Subject: Re: [BITX20] : Thank you!

 

Reed, All:

 

I'm in Miami and leave on a 9 day cruise tomorrow and will likely not have Internet access until I get home. I'll look  at it then.

 

Jack, W8TEE

 

On Thursday, January 23, 2020, 2:03:28 AM EST, Reed N <greenkid336600+groupsio@...> wrote:

 

 

Hi Jack,

The code files were named *.cpp even before I started work on it, so I can't take any credit for that. See Ashhar's commit just prior to when I started working on the project for evidence: https://github.com/reedbn/ubitxv6/tree/fe1ff169380f744d8a07c194dcae51e3264e2a39

I haven't touched the README.md (having too much fun working on the actual code!) but I agree that the wording isn't quite right. Could you make the required changes and then create a pull request into my master branch?


Reed


--
Jack, W8TEE


--

…_. _._

Re: : Thank you!

Jack, W8TEE
 

Reed, All:

I'm in Miami and leave on a 9 day cruise tomorrow and will likely not have Internet access until I get home. I'll look  at it then.

Jack, W8TEE

On Thursday, January 23, 2020, 2:03:28 AM EST, Reed N <greenkid336600+groupsio@...> wrote:


Hi Jack,

The code files were named *.cpp even before I started work on it, so I can't take any credit for that. See Ashhar's commit just prior to when I started working on the project for evidence: https://github.com/reedbn/ubitxv6/tree/fe1ff169380f744d8a07c194dcae51e3264e2a39

I haven't touched the README.md (having too much fun working on the actual code!) but I agree that the wording isn't quite right. Could you make the required changes and then create a pull request into my master branch?


Reed

--
Jack, W8TEE

Re: Relative Power indication on Nextion display

Dan YO5RXM
 

Hi MIke, 
Well sort of. In ubitx.h file there is a setting for SMeterLatency, which is by default 3. I changed it to 1 (this means 0.25 sec latency instead of 0.75) and now S-Meter seems more "fluid".
The setting is line 56:
#define SMeterLatency   3               //1 is 0.25 sec

Re: Knob "Momentum" #ubitx #v6

Bert N8NN
 

Reed -- Sorry for my slow response getting back to you.  By "aggressive" I mean that the frequency change is too large once it kicks in.  Sometimes I find myself 300-400 KHZ away before I slow my turning.  Perhaps it's just the "operator" who needs a more steady hand!  I'll work with it a while.  It's much better than having no acceleration at all.  Big improvement to add this feature.

Bert N8NN

Re: IRF510 insulation question #v5

Doug W
 

On Wed, Jan 1, 2020 at 12:05 PM, Anthony F4HUY wrote:
Question about IRF, does it need to isolate IRF from ground, from metal enclosure, i want to use another kind of heatsink, 
I used a thermal pad https://www.digikey.com/product-detail/en/t-global-technology/DC0011-08-L37-3F-0.25-2A/1168-1803-ND/3466713 between the MOSFETs and heat sinks and used nylon M3 screws and nuts so I didn't have to deal with bushings.
 
--
www.bitxmap.com

REPLACEMENT RADUINO

dave
 

where in the UK can i get a raduino clone  or similar ( i have numerous nanos ) for my bitx40 v3   many thanks  dave c  gw0nvf

Re: IRF510 insulation question #v5

Don - KM4UDX
 

hummm...I confess I never thought of using the bushing on the back side against the heat sink....that assumes in torquing down the screw that the bushing is not distorted or flattened...in my case the hole in the heatsinks looks like there were drilled with a bad stick, a twisted file, and a blow torch for good measure. In short, they are a mess and bigger than the bushing already.  I use a washer to cover up my metallurgical butchery.

But....the notion of using the bushing on the back of the heatsink strikes me as very workable, in more competent hands than my own...hahahah.  Thank you very very much...I'm going to think about this approach....the old bean is on the case...hahah.

Don

Re: bitx40 v3 cw mods

Jim WB2LHP in MI
 

Don's right...It probably can be done but why would you?...Better to get all the advantages and automation provided by a Raduino or similar controller/VFO...There are several of them out there...However you can usually find a BitX40 V3 board set used for around $50 US...Just wire it up and go...Unless you just really want to tinker this would be the best way to go...I like the BitX40 a lot...It's a fine radio...Jim WB2LHP

On Thu, Jan 23, 2020 at 11:52 AM Don, ND6T via Groups.Io <nd6t_6=yahoo.com@groups.io> wrote:
Dave,

Not anything good. For one, it drifts like nobody's business. For another, about the only way to make it transmit CW is to put a tone into the transmit audio instead of the microphone. That results in a bunch of nasties being transmitted. Suppressed carrier remains, the suppressed sideband tone, and several intermod spurs within the passband. Sure, they are down 20 dB or so but folks nearby won't be pleased. You could always use just the receiver and a separate transmitter. Or you could build another, separate VFO in there, mute the original transmitted signal back near the balanced mixer, and use the new VFO signal as a source. But why? Easier to spend ten quid and digitize it, in my opinion. For what that's worth.
73,
Don

Re: bitx40 v3 cw mods

Don, ND6T
 

Yes! The unbalanced first mixer works! But don't forget to move the VFO off frequency by an offset difference (like 700 Hz). That could be accomplished by another voltage to the tuning varactor diode, possibly from a divider from the TX voltage bus. Still, don't forget to mute the transmit audio signal.

Re: bitx40 v3 cw mods

Don, ND6T
 

Dave,

Not anything good. For one, it drifts like nobody's business. For another, about the only way to make it transmit CW is to put a tone into the transmit audio instead of the microphone. That results in a bunch of nasties being transmitted. Suppressed carrier remains, the suppressed sideband tone, and several intermod spurs within the passband. Sure, they are down 20 dB or so but folks nearby won't be pleased. You could always use just the receiver and a separate transmitter. Or you could build another, separate VFO in there, mute the original transmitted signal back near the balanced mixer, and use the new VFO signal as a source. But why? Easier to spend ten quid and digitize it, in my opinion. For what that's worth.
73,
Don

Re: bitx40 v3 cw mods

Jim WB2LHP in MI
 

Also, the CW Carrier (KEY) signal would have to go to +5 volts and the PTT (TX) signal to ground...

On Thu, Jan 23, 2020 at 11:21 AM dave <dgclifford@...> wrote:
starting from the bottom here my bitx 40 does not have a digital dislay and at the minute i do not want one i would hoever like to get it onto cw  any ideas most welcome  dave c gw0nvf

Re: bitx40 v3 cw mods

Jim WB2LHP in MI
 

Download Allard's v1.29 firmware for the BitX40...In the body of the .ZIP file there are schematics and descriptions for his CW mods...That will give you an idea of what is involved for CW operation...You could do it with a manual T/R switching arrangement without the Raduino or other controller but you would have to determine how best to implement it...Mods I think you would have to implement are Manual PTT (TX) and CW Carrier (KEY) ...You would have to come up with your own sidetone arrangement unless you have an external keyer that provides it...All in all it shouldn't be that difficult...Jim WB2LHP

On Thu, Jan 23, 2020 at 11:21 AM dave <dgclifford@...> wrote:
starting from the bottom here my bitx 40 does not have a digital dislay and at the minute i do not want one i would hoever like to get it onto cw  any ideas most welcome  dave c gw0nvf

bitx40 v3 cw mods

dave
 

starting from the bottom here my bitx 40 does not have a digital dislay and at the minute i do not want one i would hoever like to get it onto cw  any ideas most welcome  dave c gw0nvf

Re: bitx 40

Wayne Leake
 

 Actually, it's not my idea, at least regarding the boards from amateuradiokits.in (amateurradiokits,in).
 it is built into the board, and they sell/sold a separate frequency counter.
 and one can be used with Farhans V3 BITX40 boards.
 I forget the nitty gritty of connecting it though.
 I did connect the analog VFO version to a power supply to listen, and it seemed to go all over the place.
 I attribute that to the wall wart I tried being non regulated.
 Some are regulated, some are not.
 Using a single turn pot makes tuning very very touchy.
 I do recommend getting a ten turn version. Preferably with a vernier turns counter.
 Even is best, IMO, for use with the Raduino as it comes.
 Wayne WA2YNE

Re: bitx40 v3 cw mods

Don, ND6T
 

Dave,
This works for me: http://www.nd6t.com/bitx/CW . You might check out the other mods on the site, also. I mostly work CW and this makes a pretty good rig for that. I also recommend a good audio filter for those times when QRM gets annoying. I (sort of) copied the HiPerMite (http://www.4sqrp.com/hipermite) design with an LM324 that I had but the kit is cheap and very nice.
73,
Don

Re: Made Mods to V3 uBitx - no longer transmitting #ubitx-help #v3

Dennis Zabawa
 

As a guideline for future mods, do one at a time and thoroughly test each before doing the next.  This minimizes the number of points to check for errors.  As for now, review the steps of each mode until you find the problem.

bitx40 v3 cw mods

dave
 

right i have the bit40 v3   working on ssb (not as much drift as i was led to expect) i would love to convert this to a cw rig what s  the best way to modify this set  just for cw  many thanks  dave c  GW0NVF