D3a RIAA steile Pentode Eventually I came to the Internet search to the pages of Alex Kriegel, of me inter alia. had contacted because of the MTA concept – so to speak as fellow. As the owner of a true tube mountain makes him thieving fun, with exotic sophisticated circuits to design, to measure and test.
Special quality pentode designed for use as wide band amplifier QUICK REFERENCE DATA D3a Life test Low interface resistance Base Heating Heater voltage Heater current Anode current Mutual conductance Equivalent noise resistance DIMENSIONS AND CONNECTIONS Base: Noval December 1968 10000 hours Noval. Gold plated pins Indirect
Pentode tubes were first used in consumer-type radio receivers. A well-known pentode type, the EF50, was designed before the start of World War II, and was extensively used in radar sets and other military electronic equipment. The pentode contributed to the electronic preponderance of the Allies.
Jun 10, 2020 · D3a Spice Model (Pentode & Triode) My latest 300B amplifier brought me again closer to the D3a. I have to say it’s an exceptional driver for this amp as well as it can perform in a phono stage at same excellent level. I took the opportunity to trace again one Siemens D3a NOS boxed as “POS 1.176 Q 31-X 601”.
Normally, a pentode if connected as a triode will have unlinear curves, so they are not made for that. Not so with D3a! Truly amazing, excellent original triode curves are published.
Another example for a small signal frame grid pentode is the legendary Siemens D3a tube. According to Ronald Pit, EF184/6EJ7 used as a pentode will make
1T4/DF91 =remote-cutoff-Pentode= (EIA/6AR-miniature) 1.4VDC/0.05A Ef/If=1.4V/0.05A(direct heat) Epmax=90V Ec2max=90V Ec1max=0V Ikmax=5.5mA op : Ep=90V Ec2=67.5V Ec1=0V Ip=3.5mA Ic2=1.4mA rp=500kΩ gm=0.9mS (参考 : Ep-Ip特性)(pentode @Ec2=67.5V, and triode-connection) also see a similar Japanese subminiature tube w/miniature-base : 15M 1 ...
Ericsson D3A Pentode Tube $ 99.95. QTY: Add To Cart. Free Shipping Over $99* NOS-D3A-ERICSSON. Like the C3m and C3g, the D3a is a relatively modern tube developed for ... The recommended D3A Pentode vacuum tube is known for wide band telecommunication instruments for the German Post Office in the 1950s. When the D3A is treated like a triode and stepped down by a nice quality output transformer, it provides excellent performance for the task of driving low impedance headphones.
www.audiotubes.com. BRENT JESSEE RECORDING & SUPPLY, INC. 1590 West Algonquin Road #111 Hoffman Estates, IL 60192 Voice Phone 847-496-4546, Monday-Friday 8AM to 4PM USA Central Time
Normally, a pentode if connected as a triode will have unlinear curves, so they are not made for that. Not so with D3a! Truly amazing, excellent original triode curves are published.
Ericsson D3A Pentode Tube $ 99.95. QTY: Add To Cart. Free Shipping Over $99* NOS-D3A-ERICSSON. Like the C3m and C3g, the D3a is a relatively modern tube developed for ...
Jun 10, 2020 · D3a Spice Model (Pentode & Triode) My latest 300B amplifier brought me again closer to the D3a. I have to say it’s an exceptional driver for this amp as well as it can perform in a phono stage at same excellent level. I took the opportunity to trace again one Siemens D3a NOS boxed as “POS 1.176 Q 31-X 601”.
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Tube Type / Number: 7788 [E810F CV5809] Actual Brand*: Amperex PQ Printed Brand: Amperex PQ Quantity of Tubes: Single Plate Construction: Gray Smooth Getter Construction: Top [] Country of Manufacture: USA Visible Date Codes: 54-60 246 d30 *21 Lettering Condition: Average Year Made: 19...

To get the output power and low distortion that I wanted, I wound up using a KT88 beam power tube as the output tube and a D3a pentode as the driver. The D3a (also known as the 7721) is a German tube used in telephone equipment, made by Telefunken, Valvo, and Siemens.

Triode / Pentode Loadline Simulator (v.1.0 20161216) Select tube from the list. Parameters at operaing point: U a = [V] I a = [mA] U g = [V] R i = R a = [KΩ] S = [mA/V]

各真空管メーカーが製造当時発行したオリジナル規格表を、そのままデータ化!高性能な検索システムにより、全ての真空管データをpdfファイルでダウンロードできます。

Glow in the Dark Audio showcases Kevin Davis’ personal collection of small-scale, DIY and one of a kind hifi audio gear, with a focus on single ended and push pull tube amplifiers and full range open baffle speakers.
Tube Data Sheet Locator. Warning: Substitutes are given as a guide only - please refer to original manufacturers data sheets to ensure that a substitute is safe and appropriate for your application.
Tube D 3a or Röhre D3a ID19218, Vacuum Pentode, Noval, 9 pin miniature (USA pico-9) B9A and RF/IF-Stage shown. Radio tubes are valves.
– D3a – a pentode made by Siemens in 1968, with very good sonic qualities – AZ1 – dual rectifier diode made by Tesla factory in 1952 The transformers and chokes are proudly made in Holland by the master of wounding Will Blaaw of Automatic Electric Europe.
2pcs 6J52P (E810F, D3A, 7788) VACUUM PENTODE TUBES, SOVIET VALVES | NEW TUBES. New (Other) C $6.56. From Ukraine. or Best Offer +C $10.52 shipping.
Ericsson D3A Pentode Tube $ 99.95. QTY: Add To Cart. Free Shipping Over $99* NOS-D3A-ERICSSON. Like the C3m and C3g, the D3a is a relatively modern tube developed for ...
6688=E180F 10,000 hour 9 pin broadband pentode Supratek Chenin Cortese preamp Yamamoto 06-3 2010 $ 12.00. Details Read more. All prices are per tube. GE JAN 6688 / E180F
www.audiotubes.com. BRENT JESSEE RECORDING & SUPPLY, INC. 1590 West Algonquin Road #111 Hoffman Estates, IL 60192 Voice Phone 847-496-4546, Monday-Friday 8AM to 4PM USA Central Time
Jul 25, 2018 · The D3a (also known as the 7721) is a German tube used in telephone equipment, made by Telefunken, Valvo, and Siemens. The D3a is uncommon in North America, so I know many of you will ask, “Isn’t there another tube that’s easier to find that will work?”
Matched Pair Of Siemens D3A Gold Pin Pentode ( 7721 ) £74.78 + £11.81 P&P . 12AU7 VINTAGE RCA NOS BLACK PLATE BOXED VALVE/TUBE. £30.00 + £6.00 P&P . Picture ...
Mar 28, 2018 · I tried the D3a in pentode several times. It does provide more gain (which I didn’t need) and the high frequencies were a bit faster and seemingly more extended, but there were two disadvantages that made me return to triode each time. Sonically the triode configuration is warmer and has more...
Sep 04, 2010 · Produced by EAG Telefunken under contract for Siemens, the D3a was the most expensive small signal tube they produced at 145eur each (in the 1960s!) tube #1 - 20.20 mA tube #2 - 20.20 mA
Single-driver pentode test data. Last update: 8/10/03, added 6C45p-e and 6SN7 cascade for comparison. I've been running a few tests on some reasonably high-Gm pentodes, in pentode and triode mode. These are tubes that you could use as a single-tube driver for an SET, for example.
D3a: 7721: 6.3: 315: 4.2: 9EQ N45 <16: Pentode = Breitbandverstärker - Wide-Band Amplifier: 3 Tfk65 Val63: DF11 -1.2: 25: 0.5: St-8L3 <50: Regelbare HF- und ZF ...
The recommended D3A Pentode vacuum tube is known for wide band telecommunication instruments for the German Post Office in the 1950s. When the D3A is treated like a triode and stepped down by a nice quality output transformer, it provides excellent performance for the task of driving low impedance headphones.
Pentode tubes were first used in consumer-type radio receivers. A well-known pentode type, the EF50, was designed before the start of World War II, and was extensively used in radar sets and other military electronic equipment. The pentode contributed to the electronic preponderance of the Allies.
The recommended D3A Pentode vacuum tube is known for wide band telecommunication instruments for the German Post Office in the 1950s. When the D3A is treated like a triode and stepped down by a nice quality output transformer, it provides excellent performance for the task of driving low impedance headphones.
6N6P / ECC99 / E182CC tube tubes store. The 6N6P double triode is miniature device enclosed in glass bulb provided with a nine-pin base and an indirectly heated oxide-coated cathode and designed for low frequency power amplification.
Description of the D3a tube This is another fabulous tube, like C3m, C3g, etc. It can be used as pentode or in triode mode. It has triple Mica Version and very thick plated 24k gold pins.
Ericsson D3A Pentode Tube $ 99.95. QTY: Add To Cart. Free Shipping Over $99* NOS-D3A-ERICSSON. Like the C3m and C3g, the D3a is a relatively modern tube developed for ...
Aug 10, 2003 · Single-driver pentode test data. Last update: 8/10/03, added 6C45p-e and 6SN7 cascade for comparison. I've been running a few tests on some reasonably high-Gm pentodes, in pentode and triode mode. These are tubes that you could use as a single-tube driver for an SET, for example.
The 47 is a directly heated pentode, and it also has excellent triode characteristics. Not directly heated pentodes were made, because indirectly heated tubes were invented shortly after. Though a pentode, such tubes can give beautiful vintage sound, as they are indirectly heated, meaning always better tube curves.
The D3a is a special quality frame grid pentode for wideband amplification. The mutual conductance is very high at 35 mA/V. Present day use (2014) is for audio voltage amplification. The working parts are small in relation to the envelope.
Pentode tubes were first used in consumer-type radio receivers. A well-known pentode type, the EF50, was designed before the start of World War II, and was extensively used in radar sets and other military electronic equipment. The pentode contributed to the electronic preponderance of the Allies.
Oct 22, 2020 · D3a triode. Voltage according to bias requirements battery voltages limit this somewhat. Full data sheet here. The tubes are individual numbered on the tube top, and have a nice, blue paper roll on it. Inside are individual boxed tubes. Wider range for filament voltage, and a lot more.
Mar 28, 2018 · I tried the D3a in pentode several times. It does provide more gain (which I didn’t need) and the high frequencies were a bit faster and seemingly more extended, but there were two disadvantages that made me return to triode each time. Sonically the triode configuration is warmer and has more...
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Description of the D3a tube This is another fabulous tube, like C3m, C3g, etc. It can be used as pentode or in triode mode. It has triple Mica Version and very thick plated 24k gold pins.Like the C3m and C3g, the D3a is a relatively modern tube developed for use in telecommunications. Having a nine pin miniature base, the D3A yields linear curves when connected as a triode. Additionally, this tube has a gain factor of 77.
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Title: D3a 7721 Author: Telefunken Subject: FP-2002-04-21 Created Date: 4/21/2002 8:52:36 PM Find helpful customer reviews and review ratings for Set of 4 x 6J52P pentode tube, near equivalent of D3a / E810F / 7788 at Amazon.com. Read honest and unbiased product reviews from our users. Jun 17, 2017 · I think the D3a triode at 13ma as I have now, is over 2k Zout. Pentode did look good . Will be using something like that with the new LCR phono ( currently a top-plate and a big of bits ) although now the Gm amp idea from JC has come along and this opens up the possibility of a SUT-less MC input at the front end.
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Dec 19, 2020 · Solid-State Electronics Pergamon Press 1967. The pentode can be operated with much higher voltages as the screen voltage is only a few volts. For example, if the physical connection from the device to the network uses coaxial cable, the hardware that. A pentode can have its screen grid (grid 2) connected to the anode (plate), in which case. Aug 10, 2003 · Single-driver pentode test data. Last update: 8/10/03, added 6C45p-e and 6SN7 cascade for comparison. I've been running a few tests on some reasonably high-Gm pentodes, in pentode and triode mode. These are tubes that you could use as a single-tube driver for an SET, for example.
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Dec 13, 2015 · I recently got hold of some russian 6J52P(6Ж52П) pentodes which are said to be almost identical to the D3A tube. Since they have very high S I was thinking of running those as cathode followers to drive the grids of SV811-10s into Class A2. The D3a is a European pentode that has become much better known in the past several years. It’s easily available, not terribly expensive ($10 is average), and can be connected in triode mode to give us a tube that’s ideal for this application.
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I've had good sonic results using a 6072 in first position in a phono stage, active loaded with a D3a. But there was a problem. I ran it at 5mA, about 180V anode and about -1.2V bias. 0.9 watt dissipation, when the max is given as 1.5 watt. Replacement Tubes / Valves Need to replace a tube or valve for your tube amplifier? We’ve got you covered. Tubes can blow for a number of different reasons, and a lot of things, like loudspeaker efficiency, room size, and sound pressure levels, can affect the lifespan of your tubes.
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Ericsson D3A Pentode Tube $ 99.95. QTY: Add To Cart. Free Shipping Over $99* NOS-D3A-ERICSSON. Like the C3m and C3g, the D3a is a relatively modern tube developed for ... Feb 20, 2009 · Tim's KT88 Dream Single Ended Amplifier D.I.Y on 2011 Tim from Australia , he is make planning build up KT88 Single Ended Amplifier now.I got e-mail few week ago from Tim.he said would like to brew KT88 single ended
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6N6P / ECC99 / E182CC tube tubes store. The 6N6P double triode is miniature device enclosed in glass bulb provided with a nine-pin base and an indirectly heated oxide-coated cathode and designed for low frequency power amplification. The D3a is a special quality frame grid pentode for wideband amplification. The mutual conductance is very high at 35 mA/V. Present day use (2014) is for audio voltage amplification. The working parts are small in relation to the envelope.The D3a is a European pentode that has become much better known in the past several years. It’s easily available, not terribly expensive ($10 is average), and can be connected in triode mode to give us a tube that’s ideal for this application.
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The recommended D3A Pentode vacuum tube is known for wide band telecommunication instruments for the German Post Office in the 1950s. When the D3A is treated like a triode and stepped down by a nice quality output transformer, it provides excellent performance for the task of driving low impedance headphones.Mar 20, 2009 · D3a Experimenter's Printed Circuit Board This project is a circuit board which, through various jumpers, can be configured for various circuits. Specifically, it is designed around the D3a vacuum tube, a high Gm, high mu pentode.
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D3a pentode model fit D3a triode model fit. And the triode and pentode models. They can be downloaded here: D3a-Triode , D3a-Pentode-100V ...
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Title: E810F 7788 Author: Siemens Subject: FP-2014-01-19 Created Date: 1/19/2014 9:50:11 PM 各真空管メーカーが製造当時発行したオリジナル規格表を、そのままデータ化!高性能な検索システムにより、全ての真空管データをpdfファイルでダウンロードできます。
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4pcs. 6J52P = E810F = D3A = 7788 in box pentode low noise USSR new one date. $20.00 + $10.00 shipping
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The 47 is a directly heated pentode, and it also has excellent triode characteristics. Not directly heated pentodes were made, because indirectly heated tubes were invented shortly after. Though a pentode, such tubes can give beautiful vintage sound, as they are indirectly heated, meaning always better tube curves.
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The first stage is a pentode-connected low-noise pentode. One of the nice things about using a pentode here is that since the plate resistance of the pentode is so high, it has little effect on the source impedance driving the RIAA network: that is dominated by the plate load resistor.
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