I zipped the pdf but it is still to large to be accepted by diyaudio. Google "pulse generators, vol.5, glasoe and lebacqz",
and the introni.it sites pdf should come up, but, propably depending on search history, google shows different results for different peoples.
Anyway, anyone interrested can mail me at <petermessmer53@gmail.com> and i will try to send you a copy
Peter
@Tubelab_com That's useful George, thanks.
I have seen two sizes (height) of the 6HS5 with different heater currents (1.5A for the shorter, 2.4A for the taller).
Presumably these have also different Pa, although higher Ih usually means higher Ia - those electrons have to come from somewhere!
Jan
I have seen two sizes (height) of the 6HS5 with different heater currents (1.5A for the shorter, 2.4A for the taller).
Presumably these have also different Pa, although higher Ih usually means higher Ia - those electrons have to come from somewhere!
Jan
Equivalent to the CV22, the Radio Museum page lists the CV381 as "Rare". Maybe not what Jan is after?
Likely too late to be of any help but the book of that title is not by the authors you mention. Their contribution is an article "Variable-gain, Variable-Transconductance, and Multiplication Techniques: A Survey".
It appears in the book "Analog Circuit Design: MOST RF Circuits, Sigma-Delta Converters and Translinear Circuits" By Willy Sansen.
Google shows lots of bookstore sources for it as well as the possible free copy here in exchange for upload of other document at Scribd.
HTH
Maybe something like this is required?
The Valve Museum
http://www.r-type.org › aaa1098
V1505
It's OK if you can stomach a filament wattage of 50W or more, and don't mind an excess of power.
I reckon you'd need something el34 scale to drive them though...
The Valve Museum
http://www.r-type.org › aaa1098
V1505
It's OK if you can stomach a filament wattage of 50W or more, and don't mind an excess of power.
I reckon you'd need something el34 scale to drive them though...
The GI-17 I bought has about 50W heater power, with 150W max Pa and 9kV Va.
That's the ebst fit I have found until now.
Driving is no issue, I'll run them in grounded grid.
Jan
That's the ebst fit I have found until now.
Driving is no issue, I'll run them in grounded grid.
Jan
The following is all beside the point, but only to highlight actual measurement of the average cathode current ability of a 'modern' full size color TV CRT electron gun.
I worked briefly with RCA engineering while employed at a large distributor during the days when the spherical-faceplate rectangular color TV CRT technology was near its peak of development. This unusual circumstance came about due to a huge number of in-warranty consumer complaints about the picture quality. The color temperature would shift when the picture was very bright on high end 25" (26"?) TV sets. To do this I found the onset of the symprom using a 100% white screen, and measured cathode current. The three guns easily handled an average of 1.5mA at the point where the defect began to show itself. This line of TV sets was within conservative design and in production, so a CRT issue had been almost unheard of until this trouble. After the report was sent to RCA, further effort in the RCA laboratory revealed that the shadow mask was getting too hot and deforming.
(The CRTs in question were made by Hitachi at that time, RCA having been sold by GE to Thomson in 1988.)
I worked with CRT projection sets in the 1980's and 90s and the Sony SD187 6" projection
tubes that we used were rated at 1ma at 33 Kv and water cooled.
150ua might be more likely for a 25" color TV.
.The face of a TV set does not get hot.
30000V * 1.5ma = 45 Watts.
I think you dropped a decimal point.
tubes that we used were rated at 1ma at 33 Kv and water cooled.
150ua might be more likely for a 25" color TV.
.The face of a TV set does not get hot.
30000V * 1.5ma = 45 Watts.
I think you dropped a decimal point.
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Interestingly, the shadow mask was redesigned, and all CRTs in 'complaint sets' were replaced under warranty. It must have cost a fortune. The cheaper, though sleazier, thing would have been to issue a field mod for repair techs to change some parts values to prevent the current from reaching a level to show the defect, but it was after all the reputation of RCA, even if then owned by Thomson.
Alas today we all receive the sleazier solutions!
Alas today we all receive the sleazier solutions!
As to a decimal error on the beam current, no please consider the differing factors in faceplate heating vs. construction, area, and beam energy / sq. area between the two types of CRT.
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Eagerly awaiting more progress on the HV amp!
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Eagerly awaiting more progress on the HV amp!
45W is still 45W.
Oh you said that the 3 cathodes could handle 1.5ma each so the tube could dissipate 135W
without heating?
Oh you said that the 3 cathodes could handle 1.5ma each so the tube could dissipate 135W
without heating?
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From my many decades of experience as a Radio&TV repairman, the most sensitive bigger CRT were Sony-trinitron, one strong blow or fall of the TV set caused the movement and displacement of the front shadow mask and a permanent loss of the quality of the projected image,
modern TV CRT based sets had an RGB video processor with a mandatory limiter of the total cathodes current to prevent excessive X-ray emission,
btw, after many decades of work and thousands of repairs I`m still in bussines , today mostly with changes of broken LED backlight stripes, repairs of broken PSU , ...
Recently saw this amp for sale, the Fluke 5205A. May not be what you want but is a good example of a complete DC-100KHz high voltage power amp.
It's one of those pieces of gear I want to play with but can't justify.
Some specs:
DC output of +/-1500V, up to 200mA.
AC output of 1100V RMS, up to 200mA.
800V/us slew rate with 200 mA resistive load.
500V/us slew rate with 200pF capacitive load.
- slew rates deternined by capacitive load, frequency, and protection circuit -see manual.
There's one at fair radio for reasonable amount:
https://fairradio.com/product/fluke-5205a/
and the full manual is here:
https://assets.fluke.com/manuals/5205A___imeng0000.pdf
Manual's worth a good reading anyway.
It's one of those pieces of gear I want to play with but can't justify.
Some specs:
DC output of +/-1500V, up to 200mA.
AC output of 1100V RMS, up to 200mA.
800V/us slew rate with 200 mA resistive load.
500V/us slew rate with 200pF capacitive load.
- slew rates deternined by capacitive load, frequency, and protection circuit -see manual.
There's one at fair radio for reasonable amount:
https://fairradio.com/product/fluke-5205a/
and the full manual is here:
https://assets.fluke.com/manuals/5205A___imeng0000.pdf
Manual's worth a good reading anyway.
Particularly page 3-10, the schematics at the end and the first aid instructions at the beginning. Interesting hybrid amplifier!
I tried to give mine away!
FWIW, Fair Radio owner is retiring and going to auction off everything that doesn't move by June. I still have some remnants of a BC-348 receiver I bought from them in 1966.