Re: 2SC5706 from Kits and Parts
Dave,
You might want to look at the schematics of the 1W and 5W series retired from
KitsAndParts.com and see how they are used.? I also got Diz to use the 3-pin
2.54mm female headers for sockets, just in case.? And the screw+bolt to
hold the heat sink saves a lot of head scratching.
I have a 5W for 20m sitting here on my desk awaiting an order for 2SC5706s
from another vendor.? Didn't see Mike's way down the order form. Sorry
Mike.
I'll check the real ones and then check for fakes.? I'm thinking 14MHz is
good enough to test for my needs.
Speaking of fakes.? I use a component tester to check the box of transistors
for h_FE.? That is necessary but not sufficient for a good test. Anyone
Manhattan up this test fixture?? I will when I get through the ADC-40.
Maybe some has already been there and done that and give us a report.
Just to see how high the critters will go from China.
<>? h_FE test fixture.? Use with a digital
VFO to sweep for DC to 100MHz or so.? That's my plan.? What's yours?
FYI
chuck, aa7fo
BTW.? The 2SC5706 will survive a 'I forgot to hook up the antenna situation',
at least in a 1W or 5W.? I can't say the same for a 2N2222 or BS170.
toggle quoted message
Show quoted text
On 3/30/25 11:23, davidgeorgerichards via groups.io wrote: I notice that Kits and Parts have a good quantity of the through-hole version of the 2SC5706. I think the through-hole version of this transistor is now obsolete, which is why I'm interested. I'm attempting a scratch-build of a 2N2 for 20M, and wondering if this transistor would be a suitable replacement for the 2SC5739 final? Either way, it looks as if it could be useful for QRP PA's.
Dave
AA7EE
|
Re: 2SC5706 from Kits and Parts
Check out Dan's Small Parts RF Transistors
.
Some possibilities are:
RCA-4013 ...TO-39 METAL CAN..LONG LEADS..
NPN , RF POWER AMP/DRIVER
Po 3.5 WATTS MIN., 50 MHZ, 12 VOLT
COLLECTOR/BASE VOLTS 70
COLLECTOR/EMITTER VOLTS 70
BASE/EMITTER VOLTS 4
MAX COLLECTOR CURRENT 1.5 AMPS
MAX, DEVICE DISSIPATION 8 WATTS
FT 150 MHZ
THESE MAKE NICE QRP FINALS AND THESE WERE USED BY JOHNSON I THINK YEARS AGO IN CB'S
SPECIAL DEAL.....PRICE...$3.60 EA.
MOTOROLA MRF8004 TO-39 3.5 WATT AT 27MHZ..PRICE...
$3.75 EA.
MRF8004 DATA SHEET HERE
These make nice little QRP RF final Transistors..get some while available.
Mike N2MS
toggle quoted message
Show quoted text
On 03/30/2025 2:23 PM EDT davidgeorgerichards via groups.io <djdaverichards@...> wrote:
I notice that Kits and Parts have a good quantity of the through-hole version of the 2SC5706. I think the through-hole version of this transistor is now obsolete, which is why I'm interested. I'm attempting a scratch-build of a 2N2 for 20M, and wondering if this transistor would be a suitable replacement for the 2SC5739 final? Either way, it looks as if it could be useful for QRP PA's.
Dave
AA7EE
|
2SC5706 from Kits and Parts
I notice that Kits and Parts have a good quantity of the through-hole version of the 2SC5706. I think the through-hole version of this transistor is now obsolete, which is why I'm interested. I'm attempting a scratch-build of a 2N2 for 20M, and wondering if this transistor would be a suitable replacement for the 2SC5739 final? Either way, it looks as if it could be useful for QRP PA's.
?
Dave
AA7EE?
|
archive.org and ham radio magazines
If you search, you can also find:
Ham Radio Magazine
73 Magazine
For computers:
Byte Magazine
Kilobaud Magazine
for those that built their own computers back in the day.
The site is a trove of valuable history of the human race.
You are going to need lots of TBs of disk space, if you are
prone to download the Internet.
chuck, aa7fo
|
Re: The QRPp Journal of the Northern California QRP Club, Volumes #1 to #11 [long]
Dave,
Glad you and everyone enjoy the publication.
For those that have lifetime subs to ARRL.? Remember back in the '90s they had the
DVDs that had the whole issue of QST including ads and the member ads in the
back?? It is my understanding now, that you have access to all the old articles
but not the ads.? I enjoyed being able to see what prices of rigs were back
in the old days.? If I paid for advertising in an issue I'd expect it to be
forever.
In QRPp we get to see what bargains we had in the day and to refresh our memory
on how much we spent for this and that.? Might not be a good idea, but it
is there.
Doug published the initial issues for free and then went to $5 per year and
I find it awesome to consider the value.? Priceless.
thanks to all and to all a good night,
chuck, aa7fo
toggle quoted message
Show quoted text
On 3/30/25 06:52, davidgeorgerichards via groups.io wrote: On Sat, Mar 29, 2025 at 05:07 PM, chuck adams wrote:
So, if you go to <> and search for 'QRPp
Journal',
you don't need the whole string you will find my postings and you will
also find some uploaded by another individual that you may find
useful.
Thanks for this Chuck. I downloaded all 11 volumes a few years ago, from your old site, I believe. It's good to have the other scans that are on the Internet Archive, as well as Don's index (thank you Don). QRPp, for me, exemplified the spirit of homebrew QRP amateur radio. Far more interesting than pages of full color glossy ads for brand new commercial gear. Plus, the aesthetic and form factor of QRPp was spot-on. The physical journal was a manageable size, just inviting one to thumb through it multiple times. I don't know - maybe it's just me, but I find it more fun to leaf through a small publication like this, than a full-size 8.5 x 11 publication. I'm a member of GQRP, and enjoy SPRAT for the same reasons too.
Good stuff, good stuff. Thank you, thank you!
Dave
AA7EE
_._,_._,_
|
Re: The QRPp Journal of the Northern California QRP Club, Volumes #1 to #11 [long]
On Sat, Mar 29, 2025 at 05:07 PM, chuck adams wrote:
So, if you go to <> and search for 'QRPp Journal',
you don't need the whole string you will find my postings and you will
also find some uploaded by another individual that you may find useful.
Thanks for this Chuck. I downloaded all 11 volumes a few years ago, from your old site, I believe. It's good to have the other scans that are on the Internet Archive, as well as Don's index (thank you Don). QRPp, for me, exemplified the spirit of homebrew QRP amateur radio. Far more interesting than pages of full color glossy ads for brand new commercial gear. Plus, the aesthetic and form factor of QRPp was spot-on. The physical journal was a manageable size, just inviting one to thumb through it multiple times. I don't know - maybe it's just me, but I find it more fun to leaf through a small publication like this, than a full-size 8.5 x 11 publication. I'm a member of GQRP, and enjoy SPRAT for the same reasons too.
?
Good stuff, good stuff. Thank you, thank you!
?
Dave
AA7EE
|
Last Call for articles for April 2025 issue of the Flying Pigs BBQ Newsletter
Gang,
This is a last call for articles for the April 2025 issue of the BBQ.
Please send your submissions to editor@...
O. Alan Jones
N8WQ
BBQ Editor
FP #4371
|
Re: The QRPp Journal of the Northern California QRP Club, Volumes #1 to #11 [long]
I downloaded all the ones marked as 'pdf with text' from Archive.org and all of them are complete, no blank pages.
--
Terry VK5TM
|
Re: The QRPp Journal of the Northern California QRP Club, Volumes #1 to #11 [long]
Oh my gosh, what a resource.
Thanks to everyone that had a part in making this available.
I think I have the collection now in my Hamradio folder on my local
drive, to be backed up tonight.
I downloaded PDF versions from archive.org, including the index.
On the PDF I pulled down for Vol 9 Number 2 the PDF is great for
about 9 or 10 pages....then all blanks.
Anyone got a good PDF of that one they might be willing to share?? I
tried the download a few times, same result.
Thanks again to Chuck and Don for these files.?
de KB9BVN
Brian Murrey
On 3/29/2025 8:07 PM, chuck adams via
groups.io wrote:
toggle quoted message
Show quoted text
Gang,
From 1993, the year in which the NorCal Club was formed, until
2003,
Doug Hendricks, KI6DS, expended considerable energy, time and
expense
to provide a quarterly publication so indicated in the title of
this
posting.
I personally, and I'm positive (like a proton), that I am not the
only
one that considers the work one of his best works.? Consider
herding
cats.? That would be much easier than getting a bunch of ham radio
guys and girls to sit down and write about their adventurers
using,
building and reviewing everything known to mankind to be
published.
Well, related to radio stuff and the hobby.
Being an early member of the club and a devote hoarder I bought
and
saved every issue.? A few years after the publication stopped I
wanted
to be very sure that the work could be preserved.? I scanned in,
as
best I could with the equipment that I had, every issue.
I then gave the work to Doug and he had it on the home page of the
club.
He gave up the club to a committee (as clear as my feeble mind can
remember) and left everything in their hands.? The page was last
updated 2019 as shown there.
I recently discovered the work has disappeared from the home page.
The link is broken.? I contacted Doug and asked his permission to
put
the work on archive.org for posterity.? Archive.org is a valuable
resource and I hope and I pray that their work will continue
forever.
So, if you go to and search for
'QRPp Journal',
you don't need the whole string you will find my postings and you
will
also find some uploaded by another individual that you may find
useful.
I am not a fan of the grey contrast myself.
It is there for the non-commercial use of the audience and not for
transfer to other sites.? Besides, the files are huge.? Feel free
to
download them to your drive(s).
One of the things that archive.org is it uses ABBY Fine Read 9.0
to do
OCR of PDF material and creates a file thereof.? I started a long
time
ago and tried to create a table of contents for all 11 years.? It
was
too much for me.? But now, with the ASCII text, maybe some hero
can
come forth and create same by selective cut and past of the text
files.
There will be some typos, I've found no OCR program on the Earth
that
is 100%.? None.? Not even AI could do it.
If you get bored, if you want to look at history, if you are
looking
for adventure or you are looking for a Manhattan Project, either
easy
or hard, then the above 11 volumes could be a goldmine for you.
Let us know.
ciao,
chuck, aa7fo, NorCal #40
P.S.? I want to thank Wayne Burdick, N6KR, and the club for naming
a
rig after me.? :-)
P.S.S.? If you have a better scan of one or more of the issues,
please,
please, put it up on archive.org or send it to me and I'll make
sure it
gets there.
|
Re: The QRPp Journal of the Northern California QRP Club, Volumes #1 to #11 [long]
The original uploads are here
--
Terry VK5TM
|
As promised:
The indices by title, author and date.
<>
Thanks to Don, K5DW, and the fish for his work and long
may it live.
chuck, aa7fo
|
Thanks, but I have the complete set that I think you scanned.
It took a while but it was a labor of love.
Yes, trout. Mostly rainbows and browns. It was hot and dry that summer, the river was low and warm and the fish were really stressed.
Don,
K5DW
toggle quoted message
Show quoted text
On Mar 29, 2025, at 8:31?PM, chuck adams via groups.io <chuck.adams.phd@...> wrote:
?Thank you. You are my hero. You want a CD?
I was about to say that I'd throw up if you told me how
many hours you spent. :-) I know how much I spent before
I stopped, thinking I'd get 'round to it.
The world thanks you and I'll put you down as the author of
course. Hope you don't mind being grabbed up by chatGPT and
DeepSeek to be remembered forever.
Trout?
ciao,
chuck, aa7fo
On 3/29/25 18:26, Don K5DW via groups.io wrote:
Absolutely! I was at our cabin in Colorado that summer and the fish weren¡¯t biting, so¡!
Glad to have you back!
Don,
K5DW
On Mar 29, 2025, at 8:21?PM, chuck adams via groups.io <chuck.adams.phd@...> wrote: ?Don,
I was in the process of emailing you, but let me do it here.
Can I get your permission to put the three files into one pdf and
put it on archive.org with the 11 volumes to be perserved forever
and ever.....
It would be appreciated by the Universe at large.
thanks,
chuck, aa7fo
On 3/29/25 18:19, Don K5DW via groups.io wrote:
Chuck, et al,
Back in 2018 I generated a complete index for QRPp and placed 3 copies, sorted various ways, and placed them in the Files section of your old Qrp-tech group. Just checked and they are still there. They are pdfs titled something like ¡°Complete Index of QRPp¡¡±. I also have the original Excel file, I think. I have changed computers a couple of times since then and might take a while to find but will post it to this group if so.
Enjoy!
Don,
K5DW
--
Don, K5DW
SKCC #19269
QRP-ARCI #10145
|
Thank you.? You are my hero.? You want a CD?
I was about to say that I'd throw up if you told me how
many hours you spent.? :-)? I know how much I spent before
I stopped, thinking I'd get 'round to it.
The world thanks you and I'll put you down as the author of
course.? Hope you don't mind being grabbed up by chatGPT and
DeepSeek to be remembered forever.
Trout?
ciao,
chuck, aa7fo
toggle quoted message
Show quoted text
On 3/29/25 18:26, Don K5DW via groups.io wrote: Absolutely! I was at our cabin in Colorado that summer and the fish weren¡¯t biting, so¡!
Glad to have you back!
Don,
K5DW
On Mar 29, 2025, at 8:21?PM, chuck adams via groups.io <chuck.adams.phd@...> wrote:
?Don,
I was in the process of emailing you, but let me do it here.
Can I get your permission to put the three files into one pdf and
put it on archive.org with the 11 volumes to be perserved forever
and ever.....
It would be appreciated by the Universe at large.
thanks,
chuck, aa7fo
On 3/29/25 18:19, Don K5DW via groups.io wrote:
Chuck, et al,
Back in 2018 I generated a complete index for QRPp and placed 3 copies, sorted various ways, and placed them in the Files section of your old Qrp-tech group. Just checked and they are still there. They are pdfs titled something like ¡°Complete Index of QRPp¡¡±. I also have the original Excel file, I think. I have changed computers a couple of times since then and might take a while to find but will post it to this group if so.
Enjoy!
Don,
K5DW
|
Re: The QRPp Journal of the Northern California QRP Club, Volumes #1 to #11 [long]
Absolutely! I was at our cabin in Colorado that summer and the fish weren¡¯t biting, so¡!
Glad to have you back!
Don,
K5DW
toggle quoted message
Show quoted text
On Mar 29, 2025, at 8:21?PM, chuck adams via groups.io <chuck.adams.phd@...> wrote:
?Don,
I was in the process of emailing you, but let me do it here.
Can I get your permission to put the three files into one pdf and
put it on archive.org with the 11 volumes to be perserved forever
and ever.....
It would be appreciated by the Universe at large.
thanks,
chuck, aa7fo
On 3/29/25 18:19, Don K5DW via groups.io wrote:
Chuck, et al,
Back in 2018 I generated a complete index for QRPp and placed 3 copies, sorted various ways, and placed them in the Files section of your old Qrp-tech group. Just checked and they are still there. They are pdfs titled something like ¡°Complete Index of QRPp¡¡±. I also have the original Excel file, I think. I have changed computers a couple of times since then and might take a while to find but will post it to this group if so.
Enjoy!
Don,
K5DW
--
Don, K5DW
SKCC #19269
QRP-ARCI #10145
|
Re: The QRPp Journal of the Northern California QRP Club, Volumes #1 to #11 [long]
Don,
I was in the process of emailing you, but let me do it here.
Can I get your permission to put the three files into one pdf and
put it on archive.org with the 11 volumes to be perserved forever
and ever.....
It would be appreciated by the Universe at large.
thanks,
chuck, aa7fo
toggle quoted message
Show quoted text
On 3/29/25 18:19, Don K5DW via groups.io wrote: Chuck, et al,
Back in 2018 I generated a complete index for QRPp and placed 3 copies, sorted various ways, and placed them in the Files section of your old Qrp-tech group. Just checked and they are still there. They are pdfs titled something like ¡°Complete Index of QRPp¡¡±. I also have the original Excel file, I think. I have changed computers a couple of times since then and might take a while to find but will post it to this group if so.
Enjoy!
Don,
K5DW
|
Re: The QRPp Journal of the Northern California QRP Club, Volumes #1 to #11 [long]
Chuck, et al,
Back in 2018 I generated a complete index for QRPp and placed 3 copies, sorted various ways, and placed them in the Files section of your old Qrp-tech group. Just checked and they are still there. They are pdfs titled something like ¡°Complete Index of QRPp¡¡±. I also have the original Excel file, I think. I have changed computers a couple of times since then and might take a while to find but will post it to this group if so.
Enjoy!
Don,
K5DW
--
Don, K5DW
SKCC #19269
QRP-ARCI #10145
|
Re: [CalQRP] The QRPp Journal of the Northern California QRP Club, Volumes #1 to #11 [long]
Hi Chuck,
There is already a "complete" (1993-2003) QRPp index created by K5DW.
There are 3 files: QRPp Complete Index by Article.pdf, QRPp Complete Index By Author.pdf and QRPp Complete Index by Date.pdf.
To download the actual index files, first login to and go to the qrp-tech group, then click on "Files" on the left side, then go to page 2 of the files, or just
search the files in qrp-tech for "K5DW".
?
72, Douglas KA2UPW/5
On Sat, Mar 29, 2025 at 7:07?PM chuck adams via <chuck.adams.phd= [email protected]> wrote: Gang,
?From 1993, the year in which the NorCal Club was formed, until 2003,
Doug Hendricks, KI6DS, expended considerable energy, time and expense
to provide a quarterly publication so indicated in the title of this
posting.
I personally, and I'm positive (like a proton), that I am not the only
one that considers the work one of his best works.? Consider herding
cats.? That would be much easier than getting a bunch of ham radio
guys and girls to sit down and write about their adventurers using,
building and reviewing everything known to mankind to be published.
Well, related to radio stuff and the hobby.
Being an early member of the club and a devote hoarder I bought and
saved every issue.? A few years after the publication stopped I wanted
to be very sure that the work could be preserved.? I scanned in, as
best I could with the equipment that I had, every issue.
I then gave the work to Doug and he had it on the home page of the club.
He gave up the club to a committee (as clear as my feeble mind can
remember) and left everything in their hands.? The page was last
updated 2019 as shown there.
I recently discovered the work has disappeared from the home page.
The link is broken.? I contacted Doug and asked his permission to put
the work on for posterity.? Archive.org is a valuable
resource and I hope and I pray that their work will continue forever.
So, if you go to <> and search for 'QRPp Journal',
you don't need the whole string you will find my postings and you will
also find some uploaded by another individual that you may find useful.
I am not a fan of the grey contrast myself.
It is there for the non-commercial use of the audience and not for
transfer to other sites.? Besides, the files are huge.? Feel free to
download them to your drive(s).
One of the things that is it uses ABBY Fine Read 9.0 to do
OCR of PDF material and creates a file thereof.? I started a long time
ago and tried to create a table of contents for all 11 years.? It was
too much for me.? But now, with the ASCII text, maybe some hero can
come forth and create same by selective cut and past of the text files.
There will be some typos, I've found no OCR program on the Earth that
is 100%.? None.? Not even AI could do it.
If you get bored, if you want to look at history, if you are looking
for adventure or you are looking for a Manhattan Project, either easy
or hard, then the above 11 volumes could be a goldmine for you.
Let us know.
ciao,
chuck, aa7fo, NorCal #40
P.S.? I want to thank Wayne Burdick, N6KR, and the club for naming a
rig after me.? :-)
P.S.S.? If you have a better scan of one or more of the issues, please,
please, put it up on or send it to me and I'll make sure it
gets there.
|
The QRPp Journal of the Northern California QRP Club, Volumes #1 to #11 [long]
Gang,
From 1993, the year in which the NorCal Club was formed, until 2003,
Doug Hendricks, KI6DS, expended considerable energy, time and expense
to provide a quarterly publication so indicated in the title of this
posting.
I personally, and I'm positive (like a proton), that I am not the only
one that considers the work one of his best works.? Consider herding
cats.? That would be much easier than getting a bunch of ham radio
guys and girls to sit down and write about their adventurers using,
building and reviewing everything known to mankind to be published.
Well, related to radio stuff and the hobby.
Being an early member of the club and a devote hoarder I bought and
saved every issue.? A few years after the publication stopped I wanted
to be very sure that the work could be preserved.? I scanned in, as
best I could with the equipment that I had, every issue.
I then gave the work to Doug and he had it on the home page of the club.
He gave up the club to a committee (as clear as my feeble mind can
remember) and left everything in their hands.? The page was last
updated 2019 as shown there.
I recently discovered the work has disappeared from the home page.
The link is broken.? I contacted Doug and asked his permission to put
the work on archive.org for posterity.? Archive.org is a valuable
resource and I hope and I pray that their work will continue forever.
So, if you go to <> and search for 'QRPp Journal',
you don't need the whole string you will find my postings and you will
also find some uploaded by another individual that you may find useful.
I am not a fan of the grey contrast myself.
It is there for the non-commercial use of the audience and not for
transfer to other sites.? Besides, the files are huge.? Feel free to
download them to your drive(s).
One of the things that archive.org is it uses ABBY Fine Read 9.0 to do
OCR of PDF material and creates a file thereof.? I started a long time
ago and tried to create a table of contents for all 11 years.? It was
too much for me.? But now, with the ASCII text, maybe some hero can
come forth and create same by selective cut and past of the text files.
There will be some typos, I've found no OCR program on the Earth that
is 100%.? None.? Not even AI could do it.
If you get bored, if you want to look at history, if you are looking
for adventure or you are looking for a Manhattan Project, either easy
or hard, then the above 11 volumes could be a goldmine for you.
Let us know.
ciao,
chuck, aa7fo, NorCal #40
P.S.? I want to thank Wayne Burdick, N6KR, and the club for naming a
rig after me.? :-)
P.S.S.? If you have a better scan of one or more of the issues, please,
please, put it up on archive.org or send it to me and I'll make sure it
gets there.
|
Re: Are these the same electrically
In the first example you have to also swap C39/C40 and C43/C44 to make it work.
Both circuits work in class-C and are not suitable for the actual DSB signal.
?
--
73, Robert
|
Re: Are these the same electrically
Much the same, except in the top circuit the VCC rail will be hot with RF (unless there is decoupling down the line that is not shown.)? In the bottom circuit, C6
will put the VCC rail at RF gnd, (assuming short leads, proper type of cap, etc.)
Bob ? WB0POQ
I think I know the answer (yes they are) but just need to see if I am wrong. Silly but RF is still part Black Magic.
One powers the circuit from the top of the coil and the other from the bottom. Power is "removed" at the center tap.
?
The circuit is from a 6M DSB Manhattan style transceiver.? MUPPET style really.
?
Michael
N9XYP
?
|
Alan N8WQ
Brian KB9BVN
Don K5DW