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"Dave" wrote in message news.com... Many thanks to all who replied, both here and by email. They sound like a great tube for LOTS of purposes. My favorite suggestion was building a regen, using each half in place of the 6AQ5's called for in the ARRL handbook design from the 50's! How about an oscillator / amplifier for HF, running low plate voltage for a relatively low RF output? Seems they should be able to do that - and having a separate oscillator stage it wouldn't be prone to runaway and exessive crystal current. And it would look VERY cool! I'd think running the 829 in parallel for a HF PA, with another 829 as a P-P modulator would be a neat project. Pete |
Lots of discussion about using the 829 for VHF power amplifiers, and
even audio amplifiers and conversation pieces. But I haven't seen mention here of their use in pulse generators. I have a TS592A/UPM15 pulse generator that uses one in its output stage (not all my test equipment is very new ;-), and one of the early uses of them was as a driver in "hard tube" radar pulse modulators, developed fairly early in WWII. They were used in "Model 3 hard tube pulsers" for example, where the two sections were run in parallel, outputting well over a kilowatt during the microsecond long pulse, 0.1% duty cycle. The very similar 3E29 also get lots of mention in early radar pulser history. Perhaps someone knows: was the 3E29 an 829 re-designed and/or specifically tested for use in pulsers? What was the 829 originally intended for, and when was it first introduced? Who made the first ones, RCA or someone else? Cheers, Tom "Dave" wrote in message tnews.com... Hi all, I just found several 829B tubes - believe it or not in my garage - I must have got them in a box of stuff at a ham fest at one time. A check on Ebay shows they're pretty much worthless for the sake of dollars, but they're so COOL! With the two plate caps that are actually just stiff pins, they look like little Martians. I put a pair on my office credenza just to look geeky cool. Fresh out of the box as NOS they look amazing - just like they were made yesterday. It's a pity they have no value - maybe as a homebrew project?? So can someone tell me what they would have been used for? Something tells me they're a VHF power tube. Any application as a one-tube QRP rig of any sort? Any stories about using them in the past? I've built a lot of little rigs over the years, but never knew about the 829 Thanks, Dave |
Lots of discussion about using the 829 for VHF power amplifiers, and
even audio amplifiers and conversation pieces. But I haven't seen mention here of their use in pulse generators. I have a TS592A/UPM15 pulse generator that uses one in its output stage (not all my test equipment is very new ;-), and one of the early uses of them was as a driver in "hard tube" radar pulse modulators, developed fairly early in WWII. They were used in "Model 3 hard tube pulsers" for example, where the two sections were run in parallel, outputting well over a kilowatt during the microsecond long pulse, 0.1% duty cycle. The very similar 3E29 also get lots of mention in early radar pulser history. Perhaps someone knows: was the 3E29 an 829 re-designed and/or specifically tested for use in pulsers? What was the 829 originally intended for, and when was it first introduced? Who made the first ones, RCA or someone else? Cheers, Tom "Dave" wrote in message tnews.com... Hi all, I just found several 829B tubes - believe it or not in my garage - I must have got them in a box of stuff at a ham fest at one time. A check on Ebay shows they're pretty much worthless for the sake of dollars, but they're so COOL! With the two plate caps that are actually just stiff pins, they look like little Martians. I put a pair on my office credenza just to look geeky cool. Fresh out of the box as NOS they look amazing - just like they were made yesterday. It's a pity they have no value - maybe as a homebrew project?? So can someone tell me what they would have been used for? Something tells me they're a VHF power tube. Any application as a one-tube QRP rig of any sort? Any stories about using them in the past? I've built a lot of little rigs over the years, but never knew about the 829 Thanks, Dave |
Tom Bruhns wrote:
Lots of discussion about using the 829 for VHF power amplifiers, and even audio amplifiers and conversation pieces. But I haven't seen mention here of their use in pulse generators. I have a TS592A/UPM15 pulse generator that uses one in its output stage (not all my test equipment is very new ;-), and one of the early uses of them was as a driver in "hard tube" radar pulse modulators, developed fairly early in WWII. They were used in "Model 3 hard tube pulsers" for example, where the two sections were run in parallel, outputting well over a kilowatt during the microsecond long pulse, 0.1% duty cycle. The very similar 3E29 also get lots of mention in early radar pulser history. Perhaps someone knows: was the 3E29 an 829 re-designed and/or specifically tested for use in pulsers? What was the 829 originally intended for, and when was it first introduced? Who made the first ones, RCA or someone else? Cheers, Tom "Dave" wrote in message tnews.com... Hi all, I just found several 829B tubes - believe it or not in my garage - I must have got them in a box of stuff at a ham fest at one time. A check on Ebay shows they're pretty much worthless for the sake of dollars, but they're so COOL! With the two plate caps that are actually just stiff pins, they look like little Martians. I put a pair on my office credenza just to look geeky cool. Fresh out of the box as NOS they look amazing - just like they were made yesterday. It's a pity they have no value - maybe as a homebrew project?? So can someone tell me what they would have been used for? Something tells me they're a VHF power tube. Any application as a one-tube QRP rig of any sort? Any stories about using them in the past? I've built a lot of little rigs over the years, but never knew about the 829 Thanks, Dave Don't have answeres to all those questions but the 3E29 had a "better" cathode to handle the peak current requirements.. Bill K7NOM |
Tom Bruhns wrote:
Lots of discussion about using the 829 for VHF power amplifiers, and even audio amplifiers and conversation pieces. But I haven't seen mention here of their use in pulse generators. I have a TS592A/UPM15 pulse generator that uses one in its output stage (not all my test equipment is very new ;-), and one of the early uses of them was as a driver in "hard tube" radar pulse modulators, developed fairly early in WWII. They were used in "Model 3 hard tube pulsers" for example, where the two sections were run in parallel, outputting well over a kilowatt during the microsecond long pulse, 0.1% duty cycle. The very similar 3E29 also get lots of mention in early radar pulser history. Perhaps someone knows: was the 3E29 an 829 re-designed and/or specifically tested for use in pulsers? What was the 829 originally intended for, and when was it first introduced? Who made the first ones, RCA or someone else? Cheers, Tom "Dave" wrote in message tnews.com... Hi all, I just found several 829B tubes - believe it or not in my garage - I must have got them in a box of stuff at a ham fest at one time. A check on Ebay shows they're pretty much worthless for the sake of dollars, but they're so COOL! With the two plate caps that are actually just stiff pins, they look like little Martians. I put a pair on my office credenza just to look geeky cool. Fresh out of the box as NOS they look amazing - just like they were made yesterday. It's a pity they have no value - maybe as a homebrew project?? So can someone tell me what they would have been used for? Something tells me they're a VHF power tube. Any application as a one-tube QRP rig of any sort? Any stories about using them in the past? I've built a lot of little rigs over the years, but never knew about the 829 Thanks, Dave Don't have answeres to all those questions but the 3E29 had a "better" cathode to handle the peak current requirements.. Bill K7NOM |
"Geoffrey G. Rochat" wrote:
in elfla.com, [snip] : A lot of The Radio Amateur's Handbooks of the '50s and '60s had 892B : projects in them. The 1953 edition, immediately to my left as I write this, : has "A 100-Watt RF Amplifier for 50 and 144 Mc." on page 405. It runs : push-pull class-C, up to 120 Watts CW or FM, and 100 Watts AM. Gone by the 1955 edition I have. The 1947 ed uses it in 3 2M TX circuits. I have 3 RCA 829B and 6 or 7 slightly sturdier UK mil CV2666 equivalents, plus some CV178A / 5894 bottles I intend to use sometime in something:-) : And the following fellow has gone to an awful lot of trouble to use two : 829Bs in parallel single-ended triode mode in a stereo amplifier: : : http://www.pmillett.addr.com/829b_amplifier.htm These (Chinese) stereo push-pull amplifiers are commercial products: http://www.cayin.de/amps_de/endverstarker/929D/929D.htm http://www.cayin.de/amps_de/vollvers.../500/500mk.htm http://www.cayin.de/amps_de/endverst...00mk/800mk.htm http://www.cayin.de/amps_de/endverstarker/800/800.htm They substitute Russian FU29 or GU29 or US 3E29 in some. You can get a rough translation by copying & pasting http://translate.google.com/translate_c?hl=en&u= in front of the links, with no space between the two. These seem to be out of production now by the manufacturer; they used to be on the vaccum tube amplifier link from their English index: http://www.sparkaudio.com/eproduct.asp RdM (operators certificate in 1969 at 17 - never actually got on air - one day!) |
"Geoffrey G. Rochat" wrote:
in elfla.com, [snip] : A lot of The Radio Amateur's Handbooks of the '50s and '60s had 892B : projects in them. The 1953 edition, immediately to my left as I write this, : has "A 100-Watt RF Amplifier for 50 and 144 Mc." on page 405. It runs : push-pull class-C, up to 120 Watts CW or FM, and 100 Watts AM. Gone by the 1955 edition I have. The 1947 ed uses it in 3 2M TX circuits. I have 3 RCA 829B and 6 or 7 slightly sturdier UK mil CV2666 equivalents, plus some CV178A / 5894 bottles I intend to use sometime in something:-) : And the following fellow has gone to an awful lot of trouble to use two : 829Bs in parallel single-ended triode mode in a stereo amplifier: : : http://www.pmillett.addr.com/829b_amplifier.htm These (Chinese) stereo push-pull amplifiers are commercial products: http://www.cayin.de/amps_de/endverstarker/929D/929D.htm http://www.cayin.de/amps_de/vollvers.../500/500mk.htm http://www.cayin.de/amps_de/endverst...00mk/800mk.htm http://www.cayin.de/amps_de/endverstarker/800/800.htm They substitute Russian FU29 or GU29 or US 3E29 in some. You can get a rough translation by copying & pasting http://translate.google.com/translate_c?hl=en&u= in front of the links, with no space between the two. These seem to be out of production now by the manufacturer; they used to be on the vaccum tube amplifier link from their English index: http://www.sparkaudio.com/eproduct.asp RdM (operators certificate in 1969 at 17 - never actually got on air - one day!) |
On Sun, 08 Feb 2004 14:11:12 +1300, Ross Matheson
wrote: "Geoffrey G. Rochat" wrote: in elfla.com, [snip] : A lot of The Radio Amateur's Handbooks of the '50s and '60s had 892B : projects in them. The 1953 edition, immediately to my left as I write this, : has "A 100-Watt RF Amplifier for 50 and 144 Mc." on page 405. It runs : push-pull class-C, up to 120 Watts CW or FM, and 100 Watts AM. Gone by the 1955 edition I have. The 1947 ed uses it in 3 2M TX circuits. I have 3 RCA 829B and 6 or 7 slightly sturdier UK mil CV2666 equivalents, plus some CV178A / 5894 bottles I intend to use sometime in something:-) There used to be a *relatively* popular surplus rig that used three of them. I remember they were lined up and as I recall the final had a tuned line output link coupled to the antenna. Don't remember what it was called. That was nigh onto 40 years ago. snip Roger Halstead (K8RI & ARRL life member) (N833R, S# CD-2 Worlds oldest Debonair) www.rogerhalstead.com |
On Sun, 08 Feb 2004 14:11:12 +1300, Ross Matheson
wrote: "Geoffrey G. Rochat" wrote: in elfla.com, [snip] : A lot of The Radio Amateur's Handbooks of the '50s and '60s had 892B : projects in them. The 1953 edition, immediately to my left as I write this, : has "A 100-Watt RF Amplifier for 50 and 144 Mc." on page 405. It runs : push-pull class-C, up to 120 Watts CW or FM, and 100 Watts AM. Gone by the 1955 edition I have. The 1947 ed uses it in 3 2M TX circuits. I have 3 RCA 829B and 6 or 7 slightly sturdier UK mil CV2666 equivalents, plus some CV178A / 5894 bottles I intend to use sometime in something:-) There used to be a *relatively* popular surplus rig that used three of them. I remember they were lined up and as I recall the final had a tuned line output link coupled to the antenna. Don't remember what it was called. That was nigh onto 40 years ago. snip Roger Halstead (K8RI & ARRL life member) (N833R, S# CD-2 Worlds oldest Debonair) www.rogerhalstead.com |
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