1. BITX20@groups.io
   Date   
Re: Harmonics and Relay Replacement

Ted
 

Yeah, the biggest hazard with those relays are the 8 pointy things on the bottom, and that it takes a soldering iron to install them. 

Re: Harmonics and Relay Replacement

Jerry Gaffke
 

Good one!
Something tells me that's a staged photo.

Jerry, KE7ER



On Thu, Jan 10, 2019 at 07:21 PM, Ted wrote:
Yeah, the biggest hazard with those relays are the 8 pointy things on the bottom, and that it takes a soldering iron to install them. 

Re: Tracing receive signal for low signal

Dave Space
 

I need to do some more testing as some of my bench numbers look like they might be better than Jim's.

TP 1 @ 7.150MHZ 700uV gave 0.1 p-p
TP2 "                      200uV gave 0.1 p-p

TP16 took like 300uV to get to 0.1 p-p, so a lot more
TP17 took much more like maybe over 2000uV.. have to go back and measure.  
(It might be my signal generator doesn't get close enough to the BFO.. have to try playing with it a bit more).
Re: Harmonics and Relay Replacement

Raj vu2zap
 

At 11/01/2019, you wrote:

Even worse, the mercury I fiddled with as a kid, salvaged from thermometers.
This explains all!


Remains to be seen just how hilarious cow farts are.
I use cow methane for cooking and water heating at the farm.

Raj
Re: Case for uBITX with Nextion Display

Prathap Naidu
 

Tnx , I saw your post on the group

Will share pictures when the cabinets are ready

Tnx 73

Pop

VU2POP

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of MVS Sarma
Sent: Thursday, January 10, 2019 12:07 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Case for uBITX with Nextion Display

 

Pratap is vu2pop 

 

 

On Thu, Jan 10, 2019 at 12:04 PM Mvs Sarma <mvssarma@...> wrote:

I know that Om Pratap vu3pop from Bangalore, India, has developed. He is likely to sell them any time now.

He makes them off GI sheet, with powder coated painting. the cabinet looks elegant.

 

 he could be contacted  on gmail with his call sign

regards

sarma

 vu3zmv

 

On Thu, Jan 10, 2019 at 8:24 AM Doug Person <doug@...> wrote:

I'm wondering if anyone has identified a good case for uBTIX with enough
room for a 3.5" or bigger Nextion display.

I've been browsing around - but I'm just not sure what would work.  Ideas?

--
73 de Doug -- KJ0F
Re: Case for uBITX with Nextion Display

Prathap Naidu
 

Sorry this msg for meant to go direct to Sarma Ji

Anyway new cabinets should launched at the lamakan Ham meet, larc.in  during next week end

tnx 73

Pop

VU2POP

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Prathap Naidu via Groups.Io
Sent: Friday, January 11, 2019 2:21 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Case for uBITX with Nextion Display

 

Tnx , I saw your post on the group

Will share pictures when the cabinets are ready

Tnx 73

Pop

VU2POP

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of MVS Sarma
Sent: Thursday, January 10, 2019 12:07 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Case for uBITX with Nextion Display

 

Pratap is vu2pop 

 

 

On Thu, Jan 10, 2019 at 12:04 PM Mvs Sarma <mvssarma@...> wrote:

I know that Om Pratap vu3pop from Bangalore, India, has developed. He is likely to sell them any time now.

He makes them off GI sheet, with powder coated painting. the cabinet looks elegant.

 

 he could be contacted  on gmail with his call sign

regards

sarma

 vu3zmv

 

On Thu, Jan 10, 2019 at 8:24 AM Doug Person <doug@...> wrote:

I'm wondering if anyone has identified a good case for uBTIX with enough
room for a 3.5" or bigger Nextion display.

I've been browsing around - but I'm just not sure what would work.  Ideas?

--
73 de Doug -- KJ0F
uBitx V4 test point measurement chart #ubitx #ubitx-help

Ted
 

Raj, et al,

Might I please get my hands on a list or chart with TP levels, for troubleshooting purposes?   I did a search here on the forum but came up empty.

Thanks,

Ted
K3RTA
Re: MAX9814 as AGC preamp for output

Wayne Leake
 

 Ted, the "here" does not take me to the correct place.
 Now I am wondering.
 Best, usually, to paste in the actual URL.
 Wayne WA2YNE
Re: JackAl Encoder question...

Albert Peter
 

Dexter,

That is fine if you have one and if it fits into your panel design.  It was easier for me to drill a couple of hole than to try to retrofit a 5 or 6 jack assembly from an old computer.  But, if It works for you, go for it.

 

Thanks for the suggestion.

Al

 

Sent from Mail for Windows 10

 

From: Dexter N Muir
Sent: Wednesday, January 9, 2019 7:16 PM
To: BITX20@groups.io
Subject: Re: [BITX20] JackAl Encoder question...

 

Isolated headphone jack? How ancient is your junkbox? Old sound cards have them in various forms - even color-coded.
73 de ZL2DEX

 
Re: uBitx V4 test point measurement chart #ubitx #ubitx-help

Albert Peter
 

In the next few days I will do a setup and troubleshooting section to the user manual, including test voltages throughout the circuit diagram.  We will post a notice when it is ready.

Thanks for asking.

Al

 

Sent from Mail for Windows 10

 

From: Ted via Groups.Io
Sent: Friday, January 11, 2019 5:46 AM
To: BITX20@groups.io
Subject: [BITX20] uBitx V4 test point measurement chart #ubitx #ubitx-help

 

Raj, et al,

Might I please get my hands on a list or chart with TP levels, for troubleshooting purposes?   I did a search here on the forum but came up empty.

Thanks,

Ted
K3RTA

 
Re: ND6T AGC Troubleshooting

Albert Peter
 

Hi guys,

The new JackAl board for uBITX uses a hybrid JFET circuit for AGC control.  Have a look on   hamradiodesigns.com    and download the User Manual Section 2.  There is a complete AGC circuit in there which works very well.  You do have to break the IF chain in one spot, but nor other modifications and the uBITX reception is not changed.

 

Sent from Mail for Windows 10

 

From: Curt via Groups.Io
Sent: Thursday, January 10, 2019 9:54 PM
To: BITX20@groups.io
Subject: [BITX20] ND6T AGC Troubleshooting

 

I am beside myself that I cannot get this simple circuit doing something with the ubitx.  I am starting with the simple version with a single MOSFET, and I may add the series one later. 

I built one unit - nada.  So I build a second one, and left off the MOSFET.  I have its input attached to high side of the volume control pot (I think it is 10k in the Sunil case version), the ground attached to a connector in the closest corner of the board, and 5 volts from the raduino.  No matter how huge the signal -- I get no rectified voltage output.  What could I be doing wrong?  With hundreds of these boards in uBITX I am surprised by my result thus far. 

I am using a 2n2222A for the NPN, I have tried 3 different devices.  Yes the diodes each work on the DVM, and they are proper orientation. 

I also could not get the VK3YE AGC to work either.  The ubitx receives wonderfully and I am testing on 40m. 

73 Curt

PS - I do have a hybrid cascode but I am thinking to use it in a homebrew Rx -- not sure I wish to 'break' one of the bidirectional amplifiers here.  my goal is just to AGC the very largest signals. 

 
Re: uBitx V4 test point measurement chart #ubitx #ubitx-help

Raj vu2zap
 

Ted,

What instruments do you have? uBitx works at low signals, the signal at the product detector is almost
the same as at the antenna. I have been using my spectrum analyser to get the levels.

DC voltage chart is possible.

Raj

At 11/01/2019, you wrote:
Raj, et al,

Might I please get my hands on a list or chart with TP levels, for troubleshooting purposes? I did a search here on the forum but came up empty.

Thanks,

Ted
K3RTA
Re: Harmonics and Relay Replacement

Bill Cromwell
 

Hi Jerry,

You mean the complete lack of any solder or other tools anywhere in the photo? Shouldn't there be *something* in her other hand? And where is the solder smoke? I noticed all of that *after* I noticed she really is a pretty girl just as the label says:)

73,

Bill KU8H

On 1/10/19 10:26 PM, Jerry Gaffke via Groups.Io wrote:
Good one!
Something tells me that's a staged photo.
Jerry, KE7ER
On Thu, Jan 10, 2019 at 07:21 PM, Ted wrote:
Yeah, the biggest hazard with those relays are the 8 pointy things
on the bottom, and that it takes a soldering iron to install them.
--
bark less - wag more
Re: uBitx V4 test point measurement chart #ubitx #ubitx-help

Dan Schaefer
 

TP list and values would be great. I would like one too if it exists. 
Dan. W3BU




On Jan 11, 2019, at 5:46 AM, Ted via Groups.Io <k3rta@...> wrote:

Raj, et al,

Might I please get my hands on a list or chart with TP levels, for troubleshooting purposes?   I did a search here on the forum but came up empty.

Thanks,

Ted
K3RTA

Re: uBitx V4 test point measurement chart #ubitx #ubitx-help

Albert Peter
 

The test docs will be posted on hamradiodesigns.com in a few days.

Al

 

Sent from Mail for Windows 10

 

From: Dan Schaefer
Sent: Friday, January 11, 2019 7:08 AM
To: BITX20@groups.io
Subject: Re: [BITX20] uBitx V4 test point measurement chart #ubitx #ubitx-help

 

TP list and values would be great. I would like one too if it exists. 

Dan. W3BU

 

 

 


On Jan 11, 2019, at 5:46 AM, Ted via Groups.Io <k3rta@...> wrote:

Raj, et al,

Might I please get my hands on a list or chart with TP levels, for troubleshooting purposes?   I did a search here on the forum but came up empty.

Thanks,

Ted
K3RTA

 
Re: Using a HYCAS IF amp in the BITX receiver

ajparent1/KB1GMX <kb1gmx@...>
 

See enclosed 73mag for some test data RE: 4109 feedback amp.
Its been the gold standard for more than a few decades.

PDF
WB_amps_Sept_2002.pdf

Re: Using a HYCAS IF amp in the BITX receiver

Russ Hines
 

2N5109.  Move along. ;-)

Russ Hines
JMS & Associates, Inc.
SBE CSRE
WB8ZCC
Reply to: russ@...
On 1/11/2019 8:46 AM, ajparent1/KB1GMX wrote:

See enclosed 73mag for some test data RE: 4109 feedback amp.
Its been the gold standard for more than a few decades.

Re: MAX9814 as AGC preamp for output

MVS Sarma
 

Wayne,
 go on ebay.com and type item  292736691077

 you would get it please.
  regards
sarma
vu3zmv


On Fri, Jan 11, 2019 at 4:30 PM Wayne Leake <wayneleake@...> wrote:
 Ted, the "here" does not take me to the correct place.
 Now I am wondering.
 Best, usually, to paste in the actual URL.
 Wayne WA2YNE
Unresponsive

Jack, W8TEE
 

All:

I just looked in my Spam folder and found over 420 messages from this group and two others I belong to. If you asked me something and I did not respond, that's probably what happened. It should be fixed now.

Jack, W8TEE
_
Re: Case for uBITX with Nextion Display

Jack, W8TEE
 

Here's the same case, but for $3 less.





Jack, W8TEE

On Thursday, January 10, 2019, 6:46:26 AM EST, Bob Lunsford via Groups.Io <nocrud222@...> wrote:


Check this one out:


Bob — KK5R

--------------------------------------------
On Wed, 1/9/19, Doug Person <doug@...> wrote:

Subject: [BITX20] Case for uBITX with Nextion Display
Date: Wednesday, January 9, 2019, 9:54 PM

I'm wondering if anyone has identified a good
case for uBTIX with enough
room for a 3.5" or bigger Nextion
display.

I've been browsing around - but I'm
just not sure what would work.  Ideas?

--
73 de Doug -- KJ0F