Antique radios, Old Time Radios. Quantity of Models at Radiomuseum. Collection of Christian Schaufelberger CH. Collection of Patrice Zeissloff F. Collection of Karlheinz Fischer D. Collection of Wolfgang Bauer A.Vacuum Tubes: Current Production and New Old Stock
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Collection of Hermann Fleischanderl A. Collection of Jacky Parmentier F. Collection of Tomasz Szczesniak PL. Collection of Paolo Stigliano I. Collection of Bekir Yurdakul F. Collection of Stig Comstedt S. Collection of Geri Meier CH. Collection of Antonio Bordini I. Collection of Oskar Elm D. Collection of Antonio Rabitti BR. Collection of Bartosz Szwed GB. You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page.
You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. Country: Worldwide. RF-IF sharp cutoff amplifier. For use in sets with series connected heaters superseded by 6AU6A since November Auflage Martin Renz.This is a collection of tips and methods I have learned and used over time on many radios. I do not claim I came up with them or that they are my ideas. So take them at face value. I will be adding to this page over time.
If you don't feel you can or want to do this work then call me. I am addicted and love this work. Good luck! A must do if have one. No trick here but just some really helpful advice I did not know before working on a particular Philco radio I went to war with.
The 6X5 tubes are well known for shorting internally and causing power transformers to burn themselves up. How do I know? Recently worked on a Philco console that had a 6X5 Rectifier tube with a push pull output setup.
I first started with testing all th tubes for shorts. None found. Then after recapping and swapping out the original burnt up power transformer the radio was tested. The 6X5 tube lit up like a bright light bulb withen 20 seconds.
A few choice words were said and the battle between wits began between me and the this particular radio. After some on line research and getting to know the schematic of this radio it was discovered that this was a common problem caused by the faulty engineering of the 6X5 tube.
From my understanding the internal plates could touch drawing alot of current fast from the high voltage side of the transformer causing immediate melt down. Digging deeper into the radio and replacing again the power transformer I discovered the audio transformer was also burnt up since it also is connected to the 6X5 tube in a round about way. I do not claim to be all knowing about tubes and radios but I do believe a domino effect happened way back when and everything just got zapped. Then I come 60 years later to set them back up.
So what was the fix? Simply buy and swap it out.QRZ Forums. I find that even a slightly gassy 6AU6 after heating up in the V3 position is responsible for zeroing, stability and correct reading problems, where a brand new NOS 6AU6 tube usually clears up that problem. In researching these tubes, there seems to be ready availability of the "military" versions of this tube, which I assume to be a "heavy duty", or "ruggedized" option for our consideration.
I know there has much been written on the subject, and I have personally experienced what happens to the original neutralizing components when a B or W is used in an earlier Collins 32S-1 transmitter. Are there similar situations one should be concerned with when having such options for the 6AU6? I know there are many 7-pin pentodes using the same basing and utilization of this tube - I even have the selector knob setup memorized for my TT-1A!
I always replace this tube with a like copy during my restorations, rather than attempting a replacement of a different number - especially in the V11 slot of SB's where a 6HS6 is used instead of the 6AU6. I also assume there are no "true" replacements for the 6AU6 - not to mention that I tend to be a "purist". Also, what are the implications associated with using the four-digit commercial-numbered tubes copying the 6AU6?
Jack W3RU. W3RUApr 13, AF6LJ likes this. Perhaps the circuit stability issue isn't about the tube you are using. Yeah sure, installing a new tube seems to correct the matter but what is the underlying cause in the first place? There is always the 6AH6 tube which has been shown to work very well in RF applications which has more gain than the 6AU6. I have found the 6AH6 also works well in some audio circuits with proper bias because it has higher gain.
As per VWMI think you might need to check the following resistors for value drift due to heating and aging: R, andand clean or replace the ohm meter adjust pot. Last edited: Apr 13, AC0OBApr 13, I had the same problem recently when I restored an SB I replaced many of the components around the S meter circuit before I realized that the 6AU6 was the problem. I then swapped tubes around in the radio until I had the best tube in the V4 position. The S meter then worked very well where it hadn't before.Miniature equivalents of octal tubes.
Posted: Jan Fri 24, pm. I'm working on my DIY panadaptor and in the interest of using this sweet smaller chassis I have I was wondering if I could get a bit of help finding miniature equivalents to some of the tubes used within it. The first ones you listed are good equivalents. All three of those types were commonly used as video amplifier tubes in TV's back in the day.
Characteristics are not exactly the same but all should function. You could experiment with it and see if it will function in that circuit. A 6CB6A would be a lot closer, but doesn't have a 12 volt equivalent. If you are committed to a 12 volt filament supply, you could always put two 6 volt tubes in series.
Not really tied to it. I have most of the others in either 6 or 12 or they can be tied 6. The CRT will need its own 6V so that heater doesn't concern me.
Posted: Jan Sat 25, am. Looks like Aduiophile is good for something Posted: Feb Sun 09, am. According to Sams tube substitution handbook no. I don't know how difficult it would be to find. Posted: Feb Mon 10, am. Posted: Feb Mon 10, pm. Posted: Feb Thu 13, am.
Thanks guys. It's gotta be on PCB to fit my chassis so using 12v filaments keeps traces smaller. Time to print datasheets and make comparisons!
Tube Interchangability Reference
It's for oscillator duty tho so what specs should I pay mot attention to? Posted: Feb Tue 18, am. Transconductance, and interelectrode capacitance. Those are the most critical. However, depending upon how much feedback is built into the oscillator circuit, transconductance may not be as critical as it would first seem.
As an example, in one postwar AM radio, RCA used either a 12J5, 12SH7, or 12SR7 for the oscillator tube, and there were no major changes other than wiring the socket for whichever tube they had available that day. Page 1 of 1. Previous topic Next topic. Post subject: Miniature equivalents of octal tubes Posted: Jan Fri 24, pm. The only odd current 12v tubes I've seen were intended for use in car or mobile radios Tom Bavis.Antique radios, Old Time Radios. Quantity of Models at Radiomuseum.
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The starting voltage of most CCF tubes is both time and temperature. This note will help operators of BURLE power tetrodes to utilize all of the features built into these tubes and to achieve long tube life. CERMOLOX tetrodes have many performance advantages, but visual examination of the tube 's internal structurefilament current carefully to assure normal filament, as well as tubeoperation.
Handling Handle. Abstract: No abstract text available Text: 7. Abstract: general electric 3dr3 instrument department general electric company Text: the high voltage rectifier to supply power to the anode of the picture tube.
Features of the tubeapplicable to a bogey electron tube of a specified type as defined by its published data and should not be exceeded under the worst probable conditions. The tube manufacturer chooses these values to provide acceptable serviceability of the tubemaking allowance for the effects of changes in operating conditions due to variations in the characteristics of the tube under consideration.
Grades of 6AU6, 6AU6A, 6AU6WA-B-C tubes
The equipment manufacturer. It is a resistor whosethe tube varies, the current remains practically constant. The operation is the same on eithertubethe voltage range over which the current is nearly constant is given together with a maximum andtube may be operated.
Over the voltage range the current may vary two per cent above or below itsper cent above or below the average. The limits given in the tube ratings cover these factors. A tubetype B, recently developed by the Burroughs Corporation. This memorandum describes the general concept of NIXIE tube time-sharing in terms of block diagrams andcathode current, the brightness compensation is achieved by using a higher current level when the tube is energized.
This is entirely possible with the new type B tube. At a duty factor of 5 percent and at an anode current of 15 mA, the type B tube appears as bright as it would under normal d-c operation. Abstract: BS Text: - Lok Hydraulic Tube Fittings q The large area of the sleeve in contact with the tube acts as a tube support and improves the vibration resistance of the assembly. Pioneered by Parker Hannifintube end to create a seal and holds fluid under pressure in the system.
6J5P = 6AH6 = 6F36 = 6485 tube. Pentode
Thread starter timwillhack Start date Oct 4, Tags headphone-amplifiers. Post 1 of 3. Joined Mar 10, Messages 27 Reaction score Joined Mar 10, Posts 27 Likes I read that there are ones that will fit but are not made for it due to various differences.
We find this incorrectly! So is for instance a 6DJ8 wich is made in the sixties by Philips in the Netherlands for an American colleague, exactly the same as their ECC88 sold on the European market. Only the imprint is different. Also the Mu is almost te same, 35 instead of You can see that in the table below.
With a large enough power transformer that shall be no problem, but it is something to care about. That is an important reason wherefore it can not replace in all times a 6DJ8 etc. Especially on a rather low tension, for intance about 90V or lower works the 6N1P not goed or even not at all. On tensions above V, if the idle current is correct this tube can give very good results. Especially the High Rel version 6N1P-EV has already astonished many people, because it came in a few circuits to better result then famous brands like Mullard, Philips etc.
These performances are very dependable of circuit and anode tension. There exist till now no versions with goldpins. May 7, Post 2 of 3. Joined Jan 18, Messages 5 Reaction score Joined Jan 18, Posts 5 Likes Your Help will be appreciated. Kind Rgds Francis Jansz. Share This Post. Post 3 of 3. Please confirm if this is O K.