Date   
Re: High voltage and higher power output - what heat sink are you using?

Bill Meara
 

If you "remote" the 510 by adding even a small amount of wire you run the risk of turning that amplifier into a big ugly oscillator (been there, done that!). One of the reasons the BITX 40 amp is so trouble-free is that the layout is good and the leads are very short.  73  Bill N2CQR


On Friday, January 13, 2017 8:14 PM, don frasher via Groups.Io <donfrasher@...> wrote:


What I have done with other projects is to mount the output transistor remotely..  This allows for easy use of the case itself as a heat sink, as well as makes it easier to use "junk box" heat sinks that do not fit the printed circuit board.
  Surprised I have not seen this option all ready mentioned.. pretty simple matter of removing the 510 and running wire.

73
Don Frasher  AD7LL


Re: High voltage and higher power output - what heat sink are you using?

John Daly
 

Thanks, Bill. On another note, thanks for Soldersmoke and your QRP book, which I read 3-4 years old. Will take a look at your information. 73 - w4usf

Re: Video on ND6T's Shuttle DDS Tuning

Bill Meara
 

Roy:  Click on the BITXHACKS link and the video Is there.   Or go to http://bitxhacks.blogspot.com
73  Bill



On Friday, January 13, 2017 8:18 PM, Roy Appleton <twelveoclockhigh@...> wrote:


Great, only problem is that the web site doesn't have a link to any video!

Roy
WA0YMH

On Jan 13, 2017 6:29 PM, "Bill Meara via Groups.Io" <n2cqr=yahoo.com@groups.io> wrote:
Don ND6T sent us a video on his intriguing method of tuning an AD9850 in his BITX 40 Module.  It works very well.  Take a look:




Re: Video on ND6T's Shuttle DDS Tuning

Roy Appleton
 

Great, only problem is that the web site doesn't have a link to any video!

Roy
WA0YMH

On Jan 13, 2017 6:29 PM, "Bill Meara via Groups.Io" <n2cqr=yahoo.com@groups.io> wrote:
Don ND6T sent us a video on his intriguing method of tuning an AD9850 in his BITX 40 Module.  It works very well.  Take a look:


Re: High voltage and higher power output - what heat sink are you using?

don frasher
 

What I have done with other projects is to mount the output transistor remotely..  This allows for easy use of the case itself as a heat sink, as well as makes it easier to use "junk box" heat sinks that do not fit the printed circuit board.
  Surprised I have not seen this option all ready mentioned.. pretty simple matter of removing the 510 and running wire.

73
Don Frasher  AD7LL

Re: High voltage and higher power output - what heat sink are you using?

Bill Meara
 

John:  At first, I had a little muffin fan on the stock heat sink.  But I didn't like the noise and I kept getting my fingers in the blades.  So I did this:
Putting a Heatsink on the BITX40 Module   Be sure to read ZL2DEX's wise counsel in the comments. 




On Friday, January 13, 2017 7:12 PM, John Daly via Groups.Io <wa9whd@...> wrote:


Good evening all. I've been wondering what strategies people are using to increase heat dissipation off the IRF510 final amp when running higher power output level? Is there a logical replacement heat sink used? Or is there a way to integrate additional heat sink metal to dissipate heat? What have those of you running higher power using since the existing heat sink is insufficient for higher than standard power levels? Could a fan be used successfully with the existing heat sink if running 20-25 watts, which appears to be the maximum push for the 510? Thanks for your ideas. 73 - W4USF 


Re: Video on ND6T's Shuttle DDS Tuning

 

Bill that link doesn't work for me.

Joel 
KB6QVI

On Jan 13, 2017, at 4:29 PM, Bill Meara via Groups.Io <n2cqr@...> wrote:

Don ND6T sent us a video on his intriguing method of tuning an AD9850 in his BITX 40 Module.  It works very well.  Take a look:


Video on ND6T's Shuttle DDS Tuning

Bill Meara
 

Don ND6T sent us a video on his intriguing method of tuning an AD9850 in his BITX 40 Module.  It works very well.  Take a look:


High voltage and higher power output - what heat sink are you using?

John Daly
 

Good evening all. I've been wondering what strategies people are using to increase heat dissipation off the IRF510 final amp when running higher power output level? Is there a logical replacement heat sink used? Or is there a way to integrate additional heat sink metal to dissipate heat? What have those of you running higher power using since the existing heat sink is insufficient for higher than standard power levels? Could a fan be used successfully with the existing heat sink if running 20-25 watts, which appears to be the maximum push for the 510? Thanks for your ideas. 73 - W4USF 

Re: Higher voltage for Bitx40 Final

Richard Andrew Knack
 

Well, the other poster said the one he ordered (which I also ended up ordering) are quiet, and they sound like they will work okay for me. THanks!

Rich
KC8MWG


On Friday, January 13, 2017 4:45 PM, MAc B <sp9mrn@...> wrote:


find other seller. ;-) Works very good to circa 22v, over 22v (from 12v supply) mine is very noisy

MAc
mrn

2017-01-13 22:27 GMT+01:00 Richard Andrew Knack via Groups.Io <ihc73scout2@...>:
Wouldn't have worked for me - "Doesn't Post To United States"... :(

Rich
KC8MWG





Re: Higher voltage for Bitx40 Final

MAc B
 

find other seller. ;-) Works very good to circa 22v, over 22v (from 12v supply) mine is very noisy

MAc
mrn

2017-01-13 22:27 GMT+01:00 Richard Andrew Knack via Groups.Io <ihc73scout2@...>:

Wouldn't have worked for me - "Doesn't Post To United States"... :(

Rich
KC8MWG



Re: Higher voltage for Bitx40 Final

Richard Andrew Knack
 

Wouldn't have worked for me - "Doesn't Post To United States"... :(

Rich
KC8MWG


Re: Higher voltage for Bitx40 Final

Carl Moser
 

Re: Idea for future versions of BITX

cx4ol@...
 

Good afternoon, very good idea.
July

first qso on 80m band with bitx

9a3xz
 

guys,i put a litlle funny video and you will see Bitx in action ;)


https://www.youtube.com/watch?v=j-nPVt72utE&t=206s

Re: Higher voltage for Bitx40 Final

Richard Andrew Knack
 

Just ordered two of them: one for the Bitx20, and one for an SDR I have on the "back burner" for now that requires 15v on the TX circuit.

Rich
KC8MWG


On Friday, January 13, 2017 2:06 PM, John Stoole <jstoole@...> wrote:


Yes Rich That's the one But I paid a bit more to get one from UK, I am surprised how well it works you could not buy the parts for what they charge
73
John


Re: Seems a successful transfer

Billy Shepherd <billy.shepherd@...>
 

Nevermind J

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Mark Baldridge
Sent: Friday, January 13, 2017 2:11 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Seems a successful transfer

 

I just set up a new FAQ thread with answers to your questions.

 

Cheers!

 

KC9DZT

 

On Fri, Jan 13, 2017 at 12:30 PM, Mark <mark.g0nmy@...> wrote:

Now that the move to groups.io has been implemented.

There are a few questions I want to ask.

First, If I now leave the yahoo bitx group will it sync and remove me from io group?

Second, What are my log in details? or dont we now have any?

Obviously to join yahoo groups I needed a yahoo account and log in.

 

So what is the procedure?

Just looking for some clarity and I am sure others maybe as well

cheers Mark



¡ʎɐqǝ ɟɟo pɹɐoqʎǝʞ ɐ ʎnq ı ǝɯıʇ ʇsɐן ǝɥʇ sı sıɥʇ
Image removed by sender. www.uksmg.orgImage removed by sender.



 

--

Mark Baldridge

608.561.3853

Re: Seems a successful transfer

Billy Shepherd <billy.shepherd@...>
 

How about a link to my profile?

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Mark Baldridge
Sent: Friday, January 13, 2017 2:11 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Seems a successful transfer

 

I just set up a new FAQ thread with answers to your questions.

 

Cheers!

 

KC9DZT

 

On Fri, Jan 13, 2017 at 12:30 PM, Mark <mark.g0nmy@...> wrote:

Now that the move to groups.io has been implemented.

There are a few questions I want to ask.

First, If I now leave the yahoo bitx group will it sync and remove me from io group?

Second, What are my log in details? or dont we now have any?

Obviously to join yahoo groups I needed a yahoo account and log in.

 

So what is the procedure?

Just looking for some clarity and I am sure others maybe as well

cheers Mark



¡ʎɐqǝ ɟɟo pɹɐoqʎǝʞ ɐ ʎnq ı ǝɯıʇ ʇsɐן ǝɥʇ sı sıɥʇ
Image removed by sender. www.uksmg.orgImage removed by sender.



 

--

Mark Baldridge

608.561.3853

Re: Seems a successful transfer

Mark Baldridge
 

I just set up a new FAQ thread with answers to your questions.

Cheers!

KC9DZT

On Fri, Jan 13, 2017 at 12:30 PM, Mark <mark.g0nmy@...> wrote:
Now that the move to groups.io has been implemented.
There are a few questions I want to ask.
First, If I now leave the yahoo bitx group will it sync and remove me from io group?
Second, What are my log in details? or dont we now have any?
Obviously to join yahoo groups I needed a yahoo account and log in.

So what is the procedure?
Just looking for some clarity and I am sure others maybe as well
cheers Mark




¡ʎɐqǝ ɟɟo pɹɐoqʎǝʞ ɐ ʎnq ı ǝɯıʇ ʇsɐן ǝɥʇ sı sıɥʇ
www.uksmg.org




--
Mark Baldridge
608.561.3853

Groups.io Set Up FAQ

Mark Baldridge
 

Hopefully this will help everyone:

Q. How do I log in to groups.io?
A. Point your browser to groups.io. Click "Log In" on the top right of the website. Next click the "Email me a link to log in" button. Enter your email address that you used with the old yahoo groups. (That would be the address at which you are receiving this email.) A link will be sent to you. Follow it back to groups.io and set up a password as prompted.

Q. What will happen to the Yahoo Bitx group and our accounts?
A. The Yahoo group has been essentially closed down. If you have a yahoo account that you no longer need, you could delete it, but that is up to you. No action is specifically required.

Cheers

KC9DZT

P.S. If someone in authority needs to correct me, feel free. I'm just trying to help people out.

--
Mark Baldridge
608.561.3853