I'm looking for a winter project can any one point me in the direction of a 2 meter tube amp nothing crazy about 25-50 out, 1-10 in. I have never used or played with a tube circuit so i thougt winter why not. Thanks 73
Thank You Douglas Anoman KC9MLN KC9MLN@AMSAT.ORG Amsat #37043
For the tube, I would recommend a QQV06-40 if you can find one. Was used extensively in the VHF mobile radio market (both for mobiles in the 1960s and base stations) Will need a 600V anode supply, 250V screen grid supply and 6.3 or 12.6V heaters.
Can't find a specific design, I would just put the bits together and see what works.
On 07-Jan-10 15:56, Douglas Anoman wrote:
I'm looking for a winter project can any one point me in the direction of a 2 meter tube amp nothing crazy about 25-50 out, 1-10 in. I have never used or played with a tube circuit so i thougt winter why not. Thanks 73
http://www.g1ogy.com/qqv-0640.html
On 07-Jan-10 16:14, Nigel Gunn G8IFF/W8IFF wrote:
For the tube, I would recommend a QQV06-40 if you can find one. Was used extensively in the VHF mobile radio market (both for mobiles in the 1960s and base stations) Will need a 600V anode supply, 250V screen grid supply and 6.3 or 12.6V heaters.
Can't find a specific design, I would just put the bits together and see what works.
On 07-Jan-10 15:56, Douglas Anoman wrote:
I'm looking for a winter project can any one point me in the direction of a 2 meter tube amp nothing crazy about 25-50 out, 1-10 in. I have never used or played with a tube circuit so i thougt winter why not. Thanks 73
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I would try to locate old QSTs or Amateur Radio Handbooks that contained such circuits. Tubes such as 6146, 829, etc. were good candidates. Also the 4x/4CX150 would give up to 100+ out with just a few watts in. Newer handbooks or magazines still provide you with he necessary theory to build one from scratch. Building a tube amp is quite simple, just need to have 300 - 1000 volts dc supply based on tube and power out. Also, usually a 6.3vc transformer for filaments. Nothing wrong with tube amps. I have an old Johnson 6n2 unit that runs about 150 watts. Neat old rig. Find an old rig as I mentioned above and go online to the various manual websites and obtain the manual for an old rig. You can use that as your example.
Reid, W4UPD
Douglas Anoman wrote:
I'm looking for a winter project can any one point me in the direction of a 2 meter tube amp nothing crazy about 25-50 out, 1-10 in. I have never used or played with a tube circuit so i thougt winter why not. Thanks 73
Thank You Douglas Anoman KC9MLN KC9MLN@AMSAT.ORG Amsat #37043
Agree, and even old tubes like the 2E26, 832, etc are good tubes for this power requirement, but the problem is that tubes from that vintage are usually "sour" by now, if you can even find one. I'd suggest looking for an 'Oldtimer' whom never threw anything away, like my dad (SK) and you might luck out with tubes, caps, tank circuits, etc. Enjoy the true meaning of Ham Radio........building your own......that is what's missing in this hobby pretty much nowadays, as now we are pretty much appliance ops..
John W6ZKH
----- Original Message ----- From: "wrb" wrb@bristor-assoc.com To: KC9MLN@amsat.org Cc: amsat-bb@amsat.org Sent: Thursday, January 7, 2010 8:28:38 AM GMT -08:00 US/Canada Pacific Subject: [amsat-bb] Re: Winter Project
I would try to locate old QSTs or Amateur Radio Handbooks that contained such circuits. Tubes such as 6146, 829, etc. were good candidates. Also the 4x/4CX150 would give up to 100+ out with just a few watts in. Newer handbooks or magazines still provide you with he necessary theory to build one from scratch. Building a tube amp is quite simple, just need to have 300 - 1000 volts dc supply based on tube and power out. Also, usually a 6.3vc transformer for filaments. Nothing wrong with tube amps. I have an old Johnson 6n2 unit that runs about 150 watts. Neat old rig. Find an old rig as I mentioned above and go online to the various manual websites and obtain the manual for an old rig. You can use that as your example.
Reid, W4UPD
Douglas Anoman wrote:
I'm looking for a winter project can any one point me in the direction of a 2 meter tube amp nothing crazy about 25-50 out, 1-10 in. I have never used or played with a tube circuit so i thougt winter why not. Thanks 73
Thank You Douglas Anoman KC9MLN KC9MLN@AMSAT.ORG Amsat #37043
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Things like 6146 struggle on 10M. You're expecting a lot getting it to go on 145MHz. QQV06-40 or 2C39 are better bets for VHF.
On 07-Jan-10 16:28, wrb wrote:
I would try to locate old QSTs or Amateur Radio Handbooks that contained such circuits. Tubes such as 6146, 829, etc. were good candidates. Also the 4x/4CX150 would give up to 100+ out with just a few watts in. Newer handbooks or magazines still provide you with he necessary theory to build one from scratch. Building a tube amp is quite simple, just need to have 300 - 1000 volts dc supply based on tube and power out. Also, usually a 6.3vc transformer for filaments. Nothing wrong with tube amps. I have an old Johnson 6n2 unit that runs about 150 watts. Neat old rig. Find an old rig as I mentioned above and go online to the various manual websites and obtain the manual for an old rig. You can use that as your example.
Reid, W4UPD
Douglas Anoman wrote:
I'm looking for a winter project can any one point me in the direction of a 2 meter tube amp nothing crazy about 25-50 out, 1-10 in. I have never used or played with a tube circuit so i thougt winter why not. Thanks 73
Thank You Douglas Anoman KC9MLN KC9MLN@AMSAT.ORG Amsat #37043
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Not a problem when running them reduced power. 6146Bs worked well up to 50mhz and at half power ran them up to 2 meters. 2C39 will easily work on 2 since I have used them to 1.2 and 2.3 ghz. However, they are harder to socket them. All of the tubes mentioned (and others) are available as new/old stock from various locations including RF Parts and Hamfests. I have also used 807Ws to two meters. However, 829B, 832, 5894A (used in the Johnson 6n2) work well and are available. Might put a request on QTH as a WTB for any of the above.
Again, as previously mentioned, old handbooks and old equipment manuals found on the various manual websites for free should give you good insite as to the schematics to build such a rig. I still have a lot of tubes here for the purpose of throwing something together once and a while.
Reid, W4UPD
Nigel Gunn G8IFF/W8IFF wrote:
Things like 6146 struggle on 10M. You're expecting a lot getting it to go on 145MHz. QQV06-40 or 2C39 are better bets for VHF.
On 07-Jan-10 16:28, wrb wrote:
I would try to locate old QSTs or Amateur Radio Handbooks that contained such circuits. Tubes such as 6146, 829, etc. were good candidates. Also the 4x/4CX150 would give up to 100+ out with just a few watts in. Newer handbooks or magazines still provide you with he necessary theory to build one from scratch. Building a tube amp is quite simple, just need to have 300 - 1000 volts dc supply based on tube and power out. Also, usually a 6.3vc transformer for filaments. Nothing wrong with tube amps. I have an old Johnson 6n2 unit that runs about 150 watts. Neat old rig. Find an old rig as I mentioned above and go online to the various manual websites and obtain the manual for an old rig. You can use that as your example.
Reid, W4UPD
Douglas Anoman wrote:
I'm looking for a winter project can any one point me in the direction of a 2 meter tube amp nothing crazy about 25-50 out, 1-10 in. I have never used or played with a tube circuit so i thougt winter why not. Thanks 73
Thank You Douglas Anoman KC9MLN KC9MLN@AMSAT.ORG Amsat #37043
"...I'm looking for a winter project can any one point me in the direction of a 2 meter tube amp nothing crazy about 25-50 out, 1-10 in. I have never used or played with a tube circuit so i thougt winter why not..."
I believe the power supply will be your biggest obsticle...in the "old days," "suitable" transformers were found in every TV set (sometimes you had to use 2 ;-)
With everything now solid state, and the surplus market for higher voltage stuff shrinking, your power supply will probably cost more than the amp...unless you can grab one from someone else's abandoned project. Your output requirements are quite conservative so that may be a less costly solution.
Roger WA1KAT
----- Original Message ----- From: "wrb" wrb@bristor-assoc.com To: KC9MLN@amsat.org Cc: amsat-bb@amsat.org Sent: Thursday, January 07, 2010 11:28 AM Subject: [amsat-bb] Re: Winter Project
I would try to locate old QSTs or Amateur Radio Handbooks that contained such circuits. Tubes such as 6146, 829, etc. were good candidates. Also the 4x/4CX150 would give up to 100+ out with just a few watts in. Newer handbooks or magazines still provide you with he necessary theory to build one from scratch. Building a tube amp is quite simple, just need to have 300 - 1000 volts dc supply based on tube and power out. Also, usually a 6.3vc transformer for filaments. Nothing wrong with tube amps. I have an old Johnson 6n2 unit that runs about 150 watts. Neat old rig. Find an old rig as I mentioned above and go online to the various manual websites and obtain the manual for an old rig. You can use that as your example.
Reid, W4UPD
Douglas Anoman wrote:
I'm looking for a winter project can any one point me in the direction
of a 2 meter tube amp nothing crazy about 25-50 out, 1-10 in. I have never used or played with a tube circuit so i thougt winter why not. Thanks 73
Thank You Douglas Anoman KC9MLN KC9MLN@AMSAT.ORG Amsat #37043
Actually, 2 Meters is 149.896229 MHz...since we are picking nits...
Roger WA1KAT
Try to find an old 1950's ARRL Handbook, I am sure there are some projects like that in there.
----- Original Message ----- From: "Douglas Anoman" danoman@email.itt-tech.edu To: amsat-bb@amsat.org Sent: Thursday, January 7, 2010 7:56:29 AM GMT -08:00 US/Canada Pacific Subject: [amsat-bb] Winter Project
I'm looking for a winter project can any one point me in the direction of a 2 meter tube amp nothing crazy about 25-50 out, 1-10 in. I have never used or played with a tube circuit so i thougt winter why not. Thanks 73
Thank You Douglas Anoman KC9MLN KC9MLN@AMSAT.ORG Amsat #37043
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I have a rather tired, but otherwise intact 1948 Handbook, if you need a diagram or such.
The only problem with building stuff from there (besides needing to find parts, some of which were already old when it was printed), is finding "condensers" calibrated in "uuf", and tuning up in "megacycles". :-)
Greg KO6TH
Date: Thu, 7 Jan 2010 16:31:20 +0000 From: w6zkh@comcast.net To: KC9MLN@amsat.org CC: amsat-bb@amsat.org Subject: [amsat-bb] Re: Winter Project
Try to find an old 1950's ARRL Handbook, I am sure there are some projects like that in there.
----- Original Message ----- From: "Douglas Anoman" danoman@email.itt-tech.edu To: amsat-bb@amsat.org Sent: Thursday, January 7, 2010 7:56:29 AM GMT -08:00 US/Canada Pacific Subject: [amsat-bb] Winter Project
I'm looking for a winter project can any one point me in the direction of a 2 meter tube amp nothing crazy about 25-50 out, 1-10 in. I have never used or played with a tube circuit so i thougt winter why not. Thanks 73
Thank You Douglas Anoman KC9MLN KC9MLN@AMSAT.ORG Amsat #37043
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Try the ARRL Periodicals Archive search. There were a lot of construction articles published in the 1950's and 1960's that can be downloaded at no charge. RF Parts and Surplus Sales of Nebraska stock parts.
Remember to keep one hand in your pocket when troubleshooting. If you give the high voltage a path to ground through your heart, you're dead.
73,
John KD6OZH
----- Original Message ----- From: "Douglas Anoman" danoman@email.itt-tech.edu To: amsat-bb@amsat.org Sent: Thursday, January 7, 2010 7:56:29 AM GMT -08:00 US/Canada Pacific Subject: [amsat-bb] Winter Project
I'm looking for a winter project can any one point me in the direction of a 2 meter tube amp nothing crazy about 25-50 out, 1-10 in. I have never used or played with a tube circuit so i thougt winter why not. Thanks 73
Thank You Douglas Anoman KC9MLN KC9MLN@AMSAT.ORG Amsat #37043
You didn't say what band or what mode but you could us a couple of FM Prog Line dual 6146 strips to remove the few parts and have a tube that you can beat on and still replace with "inexpensive" new tubes or NOS.
If you were just running FM, you could just whip up an input circuit and use the strip itself as you amp.
Won't take a winter though...
Roger WA1KAT ----- Original Message ----- From: "Douglas Anoman" danoman@email.itt-tech.edu To: amsat-bb@amsat.org Sent: Thursday, January 07, 2010 10:56 AM Subject: [amsat-bb] Winter Project
I'm looking for a winter project can any one point me in the direction of
a 2 meter tube amp nothing crazy about 25-50 out, 1-10 in. I have never used or played with a tube circuit so i thougt winter why not. Thanks 73
Thank You Douglas Anoman KC9MLN KC9MLN@AMSAT.ORG Amsat #37043
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Yes he did. He specified 2 meter, that's 145MHZ to most of us.
On 07-Jan-10 20:59, Roger Kolakowski wrote:
You didn't say what band or what mode
Ah...I now see that you wanted the amp for 2 meters...eyes are getting old or I have been staring at RF tuning adjustments too long...
A "GE Prog Line" will drop right down for you.
Roger Wa1KAT ----- Original Message ----- From: "Douglas Anoman" danoman@email.itt-tech.edu To: amsat-bb@amsat.org Sent: Thursday, January 07, 2010 10:56 AM Subject: [amsat-bb] Winter Project
I'm looking for a winter project can any one point me in the direction of
a 2 meter tube amp nothing crazy about 25-50 out, 1-10 in. I have never used or played with a tube circuit so i thougt winter why not. Thanks 73
Thank You Douglas Anoman KC9MLN KC9MLN@AMSAT.ORG Amsat #37043
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Nothing wrong with the old Prog line...still the Bay Area repeater backup machine and have a couple here at the house! Robert WB5MZO
From: rogerkola@aol.com To: KC9MLN@amsat.org; amsat-bb@amsat.org Date: Thu, 7 Jan 2010 16:02:11 -0500 Subject: [amsat-bb] Re: Winter Project
Ah...I now see that you wanted the amp for 2 meters...eyes are getting old or I have been staring at RF tuning adjustments too long...
A "GE Prog Line" will drop right down for you.
Roger Wa1KAT ----- Original Message ----- From: "Douglas Anoman" danoman@email.itt-tech.edu To: amsat-bb@amsat.org Sent: Thursday, January 07, 2010 10:56 AM Subject: [amsat-bb] Winter Project
I'm looking for a winter project can any one point me in the direction of
a 2 meter tube amp nothing crazy about 25-50 out, 1-10 in. I have never used or played with a tube circuit so i thougt winter why not. Thanks 73
Thank You Douglas Anoman KC9MLN KC9MLN@AMSAT.ORG Amsat #37043
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my "project" along your lines came from the third edition of the ARRL VHF handbook...page 102 it is an 829B amp for 144mhz. I've built a couple of them over the years...and they all played pretty easy just following the instructions in the article. There are some other "'easy amps" the 6360 was a little hard to make play (it was my first OSCAR amp) but a good learning experience. I can (it will take a few days) scan some of this in and ship it to you if you would find that helpful. Power supplies are a little tricky. Fair has some transformers but they are "ouch"...I prowl garage sales and find OLD really old tv's that have tubes in them and are toast. the transformer is usually "OK".
The other day I had the Drake ML-2 and the 829 up (with a 40673 preamp) up as the space station roared over...it was kind of fun with the kids to have a back and forth with it as it flew over all with gear that is a few decades old...
anyway let me know if the copies would help Robert WB5MZO
From: danoman@email.itt-tech.edu To: amsat-bb@amsat.org Date: Thu, 7 Jan 2010 15:56:29 +0000 Subject: [amsat-bb] Winter Project
I'm looking for a winter project can any one point me in the direction of a 2 meter tube amp nothing crazy about 25-50 out, 1-10 in. I have never used or played with a tube circuit so i thougt winter why not. Thanks 73
Thank You Douglas Anoman KC9MLN KC9MLN@AMSAT.ORG Amsat #37043
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I may have some of the tubes that have been mentioned in this thread laying around.... about 25 years ago, I picked up a dead railroad Prog Line at the Wilkes Barre hamfest and, after discovering that the power supply section was seriously fried, I scrapped it. However, I saved all the tubes in case any were a match for an old Motorola tube rig that I picked up around the same time, and still have in the attic. I also have a lot of old TV tubes from my dad's "stuff", as well as some spares from a WW II VHF DF set (BC-639, maybe?).
Will check this weekend if I get the chance.
George, KA3HSW
I keep running across some 832/829B sockets (maybe also 5894) in my pile of stuff...that means there are tubes somewhere in the same pile...
Roger WA1KAT ----- Original Message ----- From: "George Henry" ka3hsw@att.net To: "amsat bb" amsat-bb@amsat.org Sent: Friday, January 08, 2010 7:36 PM Subject: [amsat-bb] Re: Winter Project
I may have some of the tubes that have been mentioned in this thread
laying
around.... about 25 years ago, I picked up a dead railroad Prog Line at
the
Wilkes Barre hamfest and, after discovering that the power supply section was seriously fried, I scrapped it. However, I saved all the tubes in
case
any were a match for an old Motorola tube rig that I picked up around the same time, and still have in the attic. I also have a lot of old TV tubes from my dad's "stuff", as well as some spares from a WW II VHF DF set (BC-639, maybe?).
Will check this weekend if I get the chance.
George, KA3HSW
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participants (10)
-
Douglas Anoman -
George Henry -
Greg D. -
John B. Stephensen -
Nigel Gunn G8IFF/W8IFF -
Rocky Jones -
Roger Kolakowski -
w4upd -
w6zkh＠comcast.net -
wrb