UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio and TV Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > Other Discussions > Homebrew Equipment

Notices

Homebrew Equipment A place to show, design and discuss the weird and wonderful electronic creations from the hands of individual members.

Closed Thread
 
Thread Tools
Old 22nd Feb 2017, 9:32 pm   #1
Wendymott
Octode
 
Wendymott's Avatar
 
Join Date: Jun 2013
Location: Huddersfield, West Yorkshire, UK.
Posts: 1,782
Default 40 Metre SSB Transceiver.

Well its finally completed, air tested and very happy with the reports. It has taken approx 9 months from conception to final testing, but worth every minute and few pence in versions and changes.
The concept was to build a 40 metre SSB exciter/ receiver, with enough RF to drive a 100W Linear.
It was decided to build in modular form, thus if any changes were needed, and there were many, it would not be a high cost per pcb change.
The main parts were the VFO and controller, and the SSB Modulator. I had help with the VFO/controller from my associate in Australia, and the SSB modulator from Motorola, along the way I "cribbed" circuits from application notes and other SSB projects.
One area of concern, but not obvious, well to me anyway, was the rigidity of the power supplies. It essential that these are rock solid, otherwise lots of nasty effects happen.
As you can only post 5 attachments per posting I will add postings, with photo's and schematics in order.
If any member requires more info, please contact via Pvt message

I realized at the "off" that it would not be a simple project, and without help from Forum members and others who I thank most whole heartedly, it would not have been possible.
Attached Thumbnails
Click image for larger version

Name:	P1 Block Diagram Ver 5.jpg
Views:	177
Size:	37.0 KB
ID:	138050   Click image for larger version

Name:	A F FILTER & OUTPUT Ver2 c.jpg
Views:	189
Size:	41.0 KB
ID:	138051   Click image for larger version

Name:	Carrier Mixer V6.jpg
Views:	171
Size:	50.4 KB
ID:	138052   Click image for larger version

Name:	DDS Oscillator Ver 1.jpg
Views:	138
Size:	32.7 KB
ID:	138053   Click image for larger version

Name:	Filter matching cct.jpg
Views:	137
Size:	18.1 KB
ID:	138054  

__________________
Should get out more.

Regards
Wendy G8BZY
Wendymott is offline  
Old 22nd Feb 2017, 9:36 pm   #2
Wendymott
Octode
 
Wendymott's Avatar
 
Join Date: Jun 2013
Location: Huddersfield, West Yorkshire, UK.
Posts: 1,782
Default 40 Metre SSB Transceiver. part two

Part two schematics
Attached Thumbnails
Click image for larger version

Name:	Front panel Ver 5B.jpg
Views:	112
Size:	52.2 KB
ID:	138055   Click image for larger version

Name:	Linear PA 5 B.jpg
Views:	115
Size:	41.3 KB
ID:	138056   Click image for larger version

Name:	Modulator Mixer V4A.jpg
Views:	103
Size:	46.8 KB
ID:	138057   Click image for larger version

Name:	RF AMP7 Mhz V7.jpg
Views:	104
Size:	31.5 KB
ID:	138058   Click image for larger version

Name:	VOGAD preamp V5.jpg
Views:	94
Size:	38.7 KB
ID:	138059  

__________________
Should get out more.

Regards
Wendy G8BZY
Wendymott is offline  
Old 22nd Feb 2017, 9:41 pm   #3
Wendymott
Octode
 
Wendymott's Avatar
 
Join Date: Jun 2013
Location: Huddersfield, West Yorkshire, UK.
Posts: 1,782
Default 40 Metre SSB Transceiver. part three

Part three
Attached Thumbnails
Click image for larger version

Name:	VXO Ver 2.jpg
Views:	144
Size:	35.9 KB
ID:	138060   Click image for larger version

Name:	6 Front final view.jpg
Views:	204
Size:	68.3 KB
ID:	138061   Click image for larger version

Name:	10 Internal view Topside.jpg
Views:	173
Size:	115.1 KB
ID:	138063   Click image for larger version

Name:	2002A.jpg
Views:	143
Size:	53.7 KB
ID:	138064   Click image for larger version

Name:	2002B.jpg
Views:	150
Size:	53.1 KB
ID:	138065  

__________________
Should get out more.

Regards
Wendy G8BZY
Wendymott is offline  
Old 22nd Feb 2017, 9:43 pm   #4
Wendymott
Octode
 
Wendymott's Avatar
 
Join Date: Jun 2013
Location: Huddersfield, West Yorkshire, UK.
Posts: 1,782
Default 40 Metre SSB Transceiver. part four

Part four.
Well thats it........ hope you may find something useful from it.. now onto the 100W PA and PSU.
__________________
Should get out more.

Regards
Wendy G8BZY
Wendymott is offline  
Old 22nd Feb 2017, 10:19 pm   #5
Guest
Guest
 
Posts: n/a
Default Re: 40 Metre SSB Transceiver.

Super job, I bet it performs as well (if not better) as a £1k bought one. BTW what is the power out of this? I find 5W quite enough on PSK to get most of the world on the odd occasion when I do play radio.
 
Old 22nd Feb 2017, 10:51 pm   #6
Wendymott
Octode
 
Wendymott's Avatar
 
Join Date: Jun 2013
Location: Huddersfield, West Yorkshire, UK.
Posts: 1,782
Default Re: 40 Metre SSB Transceiver.

Hi Merlin. 10W PEP at the moment.... with an "after burner" being made next..I bought a module from China with IRF530's. Just needs a psu, which will be made asap. Thanks for the comments.
__________________
Should get out more.

Regards
Wendy G8BZY
Wendymott is offline  
Old 22nd Feb 2017, 10:56 pm   #7
Wendymott
Octode
 
Wendymott's Avatar
 
Join Date: Jun 2013
Location: Huddersfield, West Yorkshire, UK.
Posts: 1,782
Default Re: 40 Metre SSB Transceiver.

Sorry peeps some waveforms were missing.
Attached Thumbnails
Click image for larger version

Name:	2002G.jpg
Views:	105
Size:	73.1 KB
ID:	138068   Click image for larger version

Name:	2002H.jpg
Views:	91
Size:	70.3 KB
ID:	138069   Click image for larger version

Name:	2002II.jpg
Views:	92
Size:	60.2 KB
ID:	138070  
__________________
Should get out more.

Regards
Wendy G8BZY
Wendymott is offline  
Old 23rd Feb 2017, 10:03 am   #8
raditechman
Heptode
 
raditechman's Avatar
 
Join Date: Feb 2007
Location: West London, UK.
Posts: 865
Default Re: 40 Metre SSB Transceiver.

Nice job. Well done.
Good to see some "home brew" in amateur radio, where most use ready made these days.

Hope to read about your 100w PA in due course.

Maybe when all is working you could let us know when you may be operating so some of us on here can try to work you and hear your rig.

John
raditechman is offline  
Old 23rd Feb 2017, 11:59 am   #9
Wendymott
Octode
 
Wendymott's Avatar
 
Join Date: Jun 2013
Location: Huddersfield, West Yorkshire, UK.
Posts: 1,782
Default Re: 40 Metre SSB Transceiver.

Thanks John. I will post the PA when its done.... just getting the bits together... mainly psu bits.
I have also started the multiband version, so operating takes a back seat.
__________________
Should get out more.

Regards
Wendy G8BZY
Wendymott is offline  
Old 23rd Feb 2017, 1:20 pm   #10
Tyso_Bl
Hexode
 
Tyso_Bl's Avatar
 
Join Date: Jul 2014
Location: Magor, Monmouthshire, Wales, UK.
Posts: 436
Default Re: 40 Metre SSB Transceiver.

I'm very impressed, thats a really nice project.

Tyso
__________________
Adapt, Improvise, Oh Bother.....
Tyso_Bl is offline  
Old 23rd Feb 2017, 1:47 pm   #11
Andrew2
Nonode
 
Andrew2's Avatar
 
Join Date: Mar 2010
Location: Dukinfield, Cheshire, UK.
Posts: 2,034
Default Re: 40 Metre SSB Transceiver.

That's a heck of a job you've done there. I like the way you have taken your time over it, not like me who tends to start construction before I've even finalised the design!
And it has a keypad!

If anyone is interested, my latest Topband rig is on my website here:

http://www.freewebs.com/g1hbe/topbandupdated.htm

My pages will probably disappear later this year as I've stopped the payments...
__________________
Andy G1HBE.
Andrew2 is online now  
Old 23rd Feb 2017, 2:52 pm   #12
Wendymott
Octode
 
Wendymott's Avatar
 
Join Date: Jun 2013
Location: Huddersfield, West Yorkshire, UK.
Posts: 1,782
Default Re: 40 Metre SSB Transceiver.

Nice conversion / mod Andrew......maybe we can start a new fangled craze...where Amateur radio is called Real Amateur Homebrew Radio. Sorry to offend any members who already are committed home constructors. It just seems that most QSO's are about how much money they spent on a new rig, not what they got out of building their own.
I know lots or Radio amateurs like DX hunting and "Square bashing", but not for me.
Soap box put firmly away...... for now.
__________________
Should get out more.

Regards
Wendy G8BZY
Wendymott is offline  
Old 23rd Feb 2017, 7:15 pm   #13
Station X
Moderator
 
Station X's Avatar
 
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 21,192
Default Re: 40 Metre SSB Transceiver.

Hear! Hear!
__________________
Graham. Forum Moderator

Reach for your meter before you reach for your soldering iron.
Station X is online now  
Old 23rd Feb 2017, 8:50 pm   #14
Radio Wrangler
Moderator
 
Radio Wrangler's Avatar
 
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,799
Default Re: 40 Metre SSB Transceiver.

It sounds like time for a sked....

David
__________________
Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
Radio Wrangler is online now  
Old 23rd Feb 2017, 10:40 pm   #15
Skywave
Rest in Peace
 
Join Date: Jun 2006
Location: Chard, South Somerset, UK.
Posts: 7,457
Thumbs up Re: 40 Metre SSB Transceiver.

I'm impressed: well done! Apart from the appearance of the front panel, I am impressed at the documentation you've produced. I look forward to hearing you using it on 40 m. Perhaps you could let us all know in advance - then hopefully you'll get some useful reception reports.

Al.
Skywave is offline  
Old 24th Feb 2017, 11:18 am   #16
ms660
Dekatron
 
ms660's Avatar
 
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
Default Re: 40 Metre SSB Transceiver.

Excellent on that one.

Lawrence.
ms660 is offline  
Old 24th Feb 2017, 3:12 pm   #17
Wendymott
Octode
 
Wendymott's Avatar
 
Join Date: Jun 2013
Location: Huddersfield, West Yorkshire, UK.
Posts: 1,782
Default Re: 40 Metre SSB Transceiver.

Hi peeps and well wishers....to give us all a little time to arrange something... may I suggest Monday 10am say... 7.100 or there abouts........ unless someone else has a better idea..
It would be great to have more reports.
I have just constructed a 80/40M filter module from Minikits....which I bought to "crib"...shhhhh
Needs testing on my Filter analyzer ,
Al...... the front panel was always going to be a problem, due to Letraaet not being available now.... if you could suggest improvements ?
__________________
Should get out more.

Regards
Wendy G8BZY
Wendymott is offline  
Old 24th Feb 2017, 4:33 pm   #18
G6Tanuki
Dekatron
 
G6Tanuki's Avatar
 
Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 13,951
Default Re: 40 Metre SSB Transceiver.

In these post-Letraset times you can make up a reasonable looking front panel by preparing your design in a PC drawing-package of your choice, printing it on the "put-it-through-a-laser-printer" PCB-resist film, transferring the printed image to the panel like you would do for a PCB, then protect it either varnishing it or cutting a thin sheet of acrylic to cover the whole front panel.

As to a 'net - if you make it USB then I could join in using my PRC320 (which being military only does USB).
G6Tanuki is offline  
Old 24th Feb 2017, 6:07 pm   #19
Station X
Moderator
 
Station X's Avatar
 
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 21,192
Default Re: 40 Metre SSB Transceiver.

If you make the front panel too good, people will think you're a plug and play operator who bought the set.
__________________
Graham. Forum Moderator

Reach for your meter before you reach for your soldering iron.
Station X is online now  
Old 24th Feb 2017, 6:57 pm   #20
Guest
Guest
 
Posts: n/a
Default Re: 40 Metre SSB Transceiver.

Quote:
If you make the front panel too good, people will think you're a plug and play operator who bought the set.
them, you know you built it!
 
Closed Thread

Thread Tools



All times are GMT +1. The time now is 2:59 pm.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Copyright ©2002 - 2023, Paul Stenning.