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Wurlitzer 200a electric piano replacement transistors

Hi,

Does anyone know of any non NTE Output modern day replacement transistors for the later model Wurlitzer 200a pianos? (the ones that used 2 Texas Instruments Power ''TIP'' Transistors?)

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  • Anonymous Mar 12, 2014

    hat is the age of Wurlitzer piano model 2840, serial no. 1453201

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    date of manufacture of upright player piano

  • Anonymous Mar 28, 2014

    would like to know value of Wurlitzer piano/serial#547844/model#2155/purchased in 1957

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I have cross-referenced most of the Wurlitzer 200A transistors to off-the-shelf replacement types. You can find the list at http://www.bustedgear.com/res_Wurlitzer_200A_transistors.html

Posted on May 12, 2009

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Do you have the numbers off the transistors? i can look up the data sheets and pick a suitable or improved replacement.

Posted on Jan 18, 2009

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We just got a used Wurlitzer piano. Model 2760 serial No. 1547966, trying to find out what year it was made


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Free Piano Age Research Look here. It looks like it was built between 1939 and 1940. Go down the page til you find Wurlitzer; after 1937: The year built is found by finding the serial number 192157, which would be between 180000 and 195000. That would make it having been built between 1939 and 1940. Hopefully, that's correct.

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How do I connect my roland piano 5500 to an amp


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What caused my wurlitzer model no. 625 to stop playing after removing the ear phone plug I had inserted? I get electric static when turned on so I know it's getting electricity.


Well if the removing the earphone plug and the unit no longer working aren't a co-incidence? Then perhaps the earphone socket has faulted and cut off the speakers, output. You see in an earphone socket there is an additional set of contacts, that makes & breaks the line to the speaker and routes it to the earphones, often these contacts will stay open, after the plug is withdrawn. and thus stop any output from going to the speakers. Or sometimes the solder join on the PCB can break and the effect is the same.
The only way to tell is to examine the unit and check this out. As mooted before though, i do wonder if this isn't a co-incidence, and the fault is to do with something else, often these units fail in the area of the output amplifier IC's. The unit really needs to be put through the troubleshooting procedures to exactly tell. If one was to attempt a DIY, then at the least one would need to obtain a service manual, for these steps and to obtain the parts numbers to buy any spare parts.

http://www.jukeboxparts.com/new_page_4.htm
Above is a place to assist you with a service manual, should you wish to DIY? However, Wurlitzer's are a complex device, and my professional recommendation is to get a "Quote" for any prospective repairs, from a Wurlitzer repairer.

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I am attempting to repair a Kustom K100A-1 guitar amp. I found one shorted output transistor, an RCA 36892, which crosses with a NTE 130. Do I need to replace all 5 outputs with matched transistors, or can...


I don't have a schematic for this unit, however good design would not demand matched transistors.
If a transistor has shorted, USUALLY mating transistors have been damaged. I am not sure how "5" outputs are configured as usually there is symetry and an even number. If the "5" are all on one side and there are mating trnsistors of another number, then likely there is damage to more components and probably back one stage in the drivers or even farther.
Hint: when re-powering this after repair, put a 100 Watt light bulb in series with the power into the unit to act as a limiting fuse that resets without driving heavy current into the unit causing more damage due to failed parts that were not eliminated in the first reapir.

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Wurlitzer power transistors blown


2n4919 readily available from Digikey.com PN 2N4919GOS 64 cents

2N5191 readily available from Digikey.com PN 2N5191GOS 78 cents

2N5191 readily available from Digikey.com PN 2N5194GOS 76 cents

These are NOT obsolete

Oct 08, 2009 | Music

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