¿ªÔÆÌåÓý

  1. BITX20
  2. Messages
Expanded Topics Messages Polls
Date
Re: SHOULD BE REQUIRED MODS

 

¿ªÔÆÌåÓý

Hello Mike,

?

I have similar plans for my uBITX but I am doing it for the challenge. Between the uBITX kit, the cost of the parts for the many mods that I have done, the 140 watt PA kit from Communication Concepts, and there LPF kits for 80 thru 10 meters my investment is bumping up against the $400.00 mark. Plus I¡¯m not done yet.

?

On the other hand I have a IC-751A sitting here, very clean, and in excellent working condition. It even has the internal power supply option. I have more radios then a place to put them so this 751A is looking for a new home. The price that I have on it is $450.00

?

Compared to the uBITX one would have to spend a lot more time and money to match the performance of this classic rig.

?

Ripley

?

?

Sent from for Windows 10

?

From: Bill Cromwell
Sent: Friday, December 14, 2018 8:15 AM
To: [email protected]
Subject: Re: [BITX20] SHOULD BE REQUIRED MODS

?

Hi Mike,

?

I agree with others that you would get to your 100 watt HF radio goal

for a lot less money if you shop for a used, working HF rig. Obviously a

*new* Icom, Yaesu, Kenwood, Elecraft, etc radio is going to cost much more.

?

In the 80s, when two meter FM repeaters were heavily used I built a four

watt, xtal controlled, mobile transceiver and used it daily in my truck.

Some of the younger hams hearing "home made" translated that to "free"

or "cheap". By the time I bought just the xtals for 5 frequencies I had

spent more than the price of a good, used, 10 watt, programmable

transceiver and the overall cost of building the radio was higher than a

good, used, programmable fifty watt transceiver. I did not build that

radio for "cheap". I built it for the experience and the satisfaction. I

advised those other hams of the actual cost and none of them chose to

roll their own.

?

If your uBitx has not been damaged you might be able to recover most of

your money by selling it and then buy a radio that already gives you the

HF bands with CW and SSB and maybe AM and FM at 100 watts.

?

In my book "mods" are never *required*. Only repairs are required. I

have modded some radios only to add features that were not even

available when the those radios were made.

?

Have you tried to repair your Icom? What do you have to lose by trying?

?

73,

?

Bill? KU8H

?

On 12/13/18 7:30 PM, mitchellmichaelh@... wrote:

> Is there a single source list that describes mods necessary to make

> Ubitx version 4 FCC legal.

> Is there a single source listing of additional features that can be made

> for the ver 4 ubitx eg, AGC, color displays, running digital, SDR

> addition.,power leveling on all bands.etc.

>

> My final goal will be to add 100 W (or more) amp and want a stable rig

> before that happens.The reason I bought the radio is that I cannot

> afford to replace or repair my ICOM that took a lightning strike via

> telephone lines (also took out the PC, wireless modem ,dish network

> receiver. and auto tuner that was attached to the radio. The antennas

> were not connected when the strike occurred.

> thanks WM4MM

> Mike

>

?

--

bark less - wag more

?

?

?
Re: SHOULD BE REQUIRED MODS

 

Hi Mike,

I agree with others that you would get to your 100 watt HF radio goal for a lot less money if you shop for a used, working HF rig. Obviously a *new* Icom, Yaesu, Kenwood, Elecraft, etc radio is going to cost much more.

In the 80s, when two meter FM repeaters were heavily used I built a four watt, xtal controlled, mobile transceiver and used it daily in my truck. Some of the younger hams hearing "home made" translated that to "free" or "cheap". By the time I bought just the xtals for 5 frequencies I had spent more than the price of a good, used, 10 watt, programmable transceiver and the overall cost of building the radio was higher than a good, used, programmable fifty watt transceiver. I did not build that radio for "cheap". I built it for the experience and the satisfaction. I advised those other hams of the actual cost and none of them chose to roll their own.

If your uBitx has not been damaged you might be able to recover most of your money by selling it and then buy a radio that already gives you the HF bands with CW and SSB and maybe AM and FM at 100 watts.

In my book "mods" are never *required*. Only repairs are required. I have modded some radios only to add features that were not even available when the those radios were made.

Have you tried to repair your Icom? What do you have to lose by trying?

73,

Bill KU8H

On 12/13/18 7:30 PM, mitchellmichaelh@... wrote:
Is there a single source list that describes mods necessary to make Ubitx version 4 FCC legal.
Is there a single source listing of additional features that can be made for the ver 4 ubitx eg, AGC, color displays, running digital, SDR addition.,power leveling on all bands.etc.
My final goal will be to add 100 W (or more) amp and want a stable rig before that happens.The reason I bought the radio is that I cannot afford to replace or repair my ICOM that took a lightning strike via telephone lines (also took out the PC, wireless modem ,dish network receiver. and auto tuner that was attached to the radio. The antennas were not connected when the strike occurred.
thanks WM4MM
Mike
--
bark less - wag more
Re: Nextion 2.4" display,,, Neat

 

Sure copy and paste this:
New file uploaded to [email protected]

[email protected] Notification
 

Hello,

This email message is a notification to let you know that a file has been uploaded to the Files area of the [email protected] group.

File: TRANSCEIVER SSB EASY V4-1 1 ¨¤ 30 MHz Partie 1.pdf

Uploaded By: Bernard MOUROT

Description:

You can access this file at the URL:
/g/BITX20/files/EASY%20V4-1/TRANSCEIVER%20SSB%20EASY%20V4-1%201%20%C3%A0%2030%20MHz%20Partie%201.pdf

Cheers,
The Groups.io Team
Re: SHOULD BE REQUIRED MODS

 

Hi Mike, sorry to hear that. Usually one thinks to disconnect the AC and the antennas and forgets a strike may eventually come the telephone lines. I will keep that in mind too although I usually disconnect the entire station from everything.

Supposed you will be able to have a clean ubitx, you would need to make or buy a clean well filtered PA, and in both cases it will cost maybe 300 bucks or more unless you already have the toroids and other parts. I have purchased used rigs for less than that. Keep in mind that some argue that it will not be a good idea to use a PA with the ubitx unless you find a way to actually measure the spurs and harmonics on the whole RF spectrum and then you are certain the whole system is complaint.


Il 14/dic/2018 01:30, <mitchellmichaelh@...> ha scritto:
Is there a single source list that describes mods necessary to make Ubitx version 4 FCC legal.
Is there a single source listing of additional features that can be made for the ver 4 ubitx eg, AGC, color displays, running digital, SDR addition.,power leveling on all bands.etc.

My final goal will be to add 100 W (or more) amp and want a stable rig before that happens.The reason I bought the radio is that I cannot afford to replace or repair my ICOM that took a lightning strike via telephone lines (also took out the PC, wireless modem ,dish network receiver. and auto tuner that was attached to the radio. The antennas were not connected when the strike occurred.
thanks WM4MM
Mike

Re: SHOULD BE REQUIRED MODS

 

Mike

While there is no clear concensus on details, there seem to be 2 key elements. First, reducing leakage around the low pass filter relays. One method is adding a set of relays on a daughter board so the input and output of a filter does not pass through the same relay. Second, added rejection at the 45 MHz filter stage, such as adding a crystal stage. In my local club we are doing a group build, and currently have supplied the materials for these mods. We should have sound data on a reproducible fix that hopefully some merchant will kit.

The transmit chain isn't ideal but we don't see urgent need to repair it.

Other basic mods need not be elaborate. see nd6t agc circuits for example.

I also doubt this is a cheap path to an all band 50 to 100 watt rig, but perhaps a few band PA might he reasonable. I hope a reasonable HF rig opportunity comes your way.

Curt
Re: SHOULD BE REQUIRED MODS

Gordon Gibby
 

¿ªÔÆÌåÓý

?Oh my, Mike!!!!? So sorry to hear about your lighning event.? ?


I suspect it woud be far cheaper and less frustrating to pick up a used icom radio to get to 100 watts.....


From: [email protected] <[email protected]> on behalf of mitchellmichaelh@... <mitchellmichaelh@...>
Sent: Thursday, December 13, 2018 7:30 PM
To: [email protected]
Subject: [BITX20] SHOULD BE REQUIRED MODS
?
Is there a single source list that describes mods necessary to make Ubitx version 4 FCC legal.
Is there a single source listing of additional features that can be made for the ver 4 ubitx eg, AGC, color displays, running digital, SDR addition.,power leveling on all bands.etc.

My final goal will be to add 100 W (or more) amp and want a stable rig before that happens.The reason I bought the radio is that I cannot afford to replace or repair my ICOM that took a lightning strike via telephone lines (also took out the PC, wireless modem ,dish network receiver. and auto tuner that was attached to the radio. The antennas were not connected when the strike occurred.
thanks WM4MM
Mike

SHOULD BE REQUIRED MODS

[email protected]
 

Is there a single source list that describes mods necessary to make Ubitx version 4 FCC legal.
Is there a single source listing of additional features that can be made for the ver 4 ubitx eg, AGC, color displays, running digital, SDR addition.,power leveling on all bands.etc.

My final goal will be to add 100 W (or more) amp and want a stable rig before that happens.The reason I bought the radio is that I cannot afford to replace or repair my ICOM that took a lightning strike via telephone lines (also took out the PC, wireless modem ,dish network receiver. and auto tuner that was attached to the radio. The antennas were not connected when the strike occurred.
thanks WM4MM
Mike
Re: The BITeensio board is here. #ubitx

 

¿ªÔÆÌåÓý

Forgot to answer your question. ?Yes anything using the RA8875 controller draws too much current. ?The 3.3V output from any of the Teensy MPU's is a MAX 250ma and the other chips on the board pull 50-75ma so the 230ma from the 4.3" display will exceed spec by enough to put the MPU in jeopardy.

Jim

On Dec 13, 2018, at 5:07 PM, David Negaard <draagen@...> wrote:

I'm looking at larger displays (would like to avoid the major surgery for a 5", but would like a bigger display than the 2.8"), and I'm seeing a 4.3" TFT with resistive touchscreen, 4-wire SPI, and RA8875 controller that draws 230ma at 3.3 Vdd. Would that still require the extensive mods that the 5" display requires? I'm willing to do it if I have to.

Re: The BITeensio board is here. #ubitx

David Negaard
 

I'm looking at larger displays (would like to avoid the major surgery for a 5", but would like a bigger display than the 2.8"), and I'm seeing a 4.3" TFT with resistive touchscreen, 4-wire SPI, and RA8875 controller that draws 230ma at 3.3 Vdd. Would that still require the extensive mods that the 5" display requires? I'm willing to do it if I have to.
Re: The BITeensio board is here. #ubitx

David Negaard
 

Super helpful!

By "finicky soldering," I meant specifically the soldering of the SiS5351. :D

Can't wait to get started!
Re: The BITeensio board is here. #ubitx

 

¿ªÔÆÌåÓý

Well, the BITeensio isn't offered with the finicky soldering done. ?That would make it too expensive for most people. ?Yes, there is a remote control program available on the website that interfaces to the USB port for remote control.

It uses Kenwood protocol to interface with logging programs, etc. as well. ?The programmers guide is downloadable from the website.

Jim

On Dec 13, 2018, at 3:01 PM, David Negaard <draagen@...> wrote:

Aloha Jim,

I received my kit (realized after I ordered it that I intended to order the next step up, with the fiddly bits of soldering already done, but I'll get help locally and it will be fine), and look forward to assembling it in January.

I have perused the documentation on your site, and maybe I'm just overlooking it, but can I use CAT rig control? I'm trying to visualize digital mode operation and CAT seems like the "cleanest" way to implement things like keying.

Mahalo,

de WH6FZA (formerly KB0PXK/GA)

Re: The BITeensio board is here. #ubitx

David Negaard
 

Aloha Jim,

I received my kit (realized after I ordered it that I intended to order the next step up, with the fiddly bits of soldering already done, but I'll get help locally and it will be fine), and look forward to assembling it in January.

I have perused the documentation on your site, and maybe I'm just overlooking it, but can I use CAT rig control? I'm trying to visualize digital mode operation and CAT seems like the "cleanest" way to implement things like keying.

Mahalo,

de WH6FZA (formerly KB0PXK/GA)
Re: FS: uBITX #ubitx

 

SOLD
Re: bitx40 displays version, hums, but does not receive #bitx40help #bitx40 #radiuno

 

Please try the following:
power on the radio while keeping the function button pressed

this will restore the original "factory" settings.

73 Allard PE1NWL
Re: Nextion 2.4" display,,, Neat

 

Maybe post a few pix of the display & your ubitx v3??
Re: PSK 31 not decoding

 

If you are getting a waterfall with PSK31 signals displayed, I would be a bit puzzled.? Perhaps start with digipan as it tends to be easy to get working.? Make sure you know what a PSK31 signal looks like on the waterfall.? If the emissions are something else, of course there won't be encoding.? The last version of digipan has a window for decoding all or most the signals in view.?

Since you are decoding something - one would think you have the right drivers installed.?

Possibly getting the gain setting right might be an issue - but if you have a nice waterfall the gain is okay.? It should not matter what ubitx software you have installed - PSK31 is grabbing the appropriate spectrum and letting the PC do all the work.? if you have another PC with soundcard - try receiving with a simple audio cable between them to verify all is okay with the ubitx here (if you can hear PSK31 sounds likely it is okay).?

Curt
Re: Bias adjustment - uBitx

 

Here is the link:
http://www.hfsignals.com/index.php/ubitx-tuneup/
Re: Bias adjustment - uBitx

 

Hi Chuck,

As per the instructions it is not a voltage set but a current set. Look it up to confirm my memory that it is 100 mA for each transistor with no signal applied.

73,

Bill KU8H

On 12/13/18 9:55 AM, chuckr@... wrote:
Hi all, I have to replace the finals and the bias adjust pots, what is the
voltage set for on the 510 finals ?
thanks chuck
--
bark less - wag more
Bias adjustment - uBitx

 

Hi all, I have to replace the finals and the bias adjust pots, what is the
voltage set for on the 510 finals ?

thanks chuck
54861 - 54880 of 116815