For the most part, go to www.nteinc.com,click on Semiconductor (for searching) and type in the transistor number. If there is a replacement made by NTE, it will be shown and you can look at the data sheet if it's online. On the bottom of the page will be a picture of the pinout. IN MOST CASES, the pinout will be exactly the same as the original part. If it's different, the NTE web site will note that the pinout is different.

It's the same as the MPF102 (see pinout diagram at the bottom of this page). Flat side up, legs pointing down, DSG from left to right.

By far the most comprehensive and comprehensible book on transistor bias and gain that I've run into is "Practical Transistor Circuit Design and Analysis" by Gerald Williams; 1973 McGraw Hill, TK7871.9.W53, ISBN 0-07-070398-1.

No, please be advised that an item of mail up to the maximum weight of 2kgs can be sent to named personnel only. Due to the surge of mail during the freepost period to these operational areas BFPO does not wish to delay personal mail to loved ones by accepting mail to unnamed personnel. No, military mail continues to be sent regularly. Please note that all items of mail must not exceed 2 kgs. Any items received at our BFPO sorting office that exceeds this weight will be returned to sender.

The first transistor radio was produced by a company called Regency Electronics (originally called I.D.E.A. Corporation). The company had been approached by Texas Instruments to use TI transistors to build the first commercially-produced transistor radio. This occurred only after the big players in the field (such as RCA, Emerson, and Philco) declined to take on the project. Regency was a maker of television antenna boosters at the time.

Transistor radios have been produced all over the world. Produced first by countries with the largest electronic technical pool (the United States, Japan, and several European countries), radios moved on to be items that could be easily manufactured anywhere. Radio manufacturing locations shifted as competition forced prices down, and labor became the major expense. After the U.S.

In the early 1960s, transistor prices had come down enough that certain manufacturers began to increase the count of the transistors in their radios, ostensibly to offer better performance. However, in most AM-only radios, only eight transistors actually are active in the circuit. The extra transistors were merely soldered into the board and didn't do anything! (In fact, some manufacturers used "dud" transistors.

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Definitely. We used the 741 in the VHS-1 only because of its wide availability. It's perfectly acceptable to use a more recent, single-supply op amp.

Any person living in Drachenwald who has received any armigerous award from any SCA branch in the Knowne World or who has received kingdom, baronial, or principality awards within Drachenwald. Gentles who move into the kingdom should submit their details to the Posthorn Pursuivant so they can be added to the OP database.

If you mean a channel operator, all I can suggest is becoming a regular in the channel in question and getting to know the other operators on a friendly level. Bare in mind this is only a guideline and not a set rule. Any channel may have their own set of rules for becoming an op. And then with some channels you just don't stand a chance of becoming an op regardless of how friendly you are or how much they may or may not trust you. In all cases, the worst thing you can do is ask for ops.

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I need to find that JRC4558 chip that's in the TS-808, I heard you can get them from old radios and other voodoo sources! Yes, you probably can. Or, you can buy the current chip that sounds the same as the original - so close you can't tell the difference... from MOUSER. The part number is:513-NJM4558D. There's more about the TS and chips here.

The easiest way is to get a multimeter that can measure transistor gain (hFE). The cheapest one I have found is from Hosfelt: 9202 - Multimeter, just $12.95.

No. You might try the transistor radio value guide book listed below, or ask in the Antique Radio Forums.

Yes and no. First off, we need to clear up the issue of the JRC4558D being the "TS-808 chip". It isn't true. Period. The 4558 is a standard dual operational amplifier, that was (and is) manufactured by a whole plethora of factories. Now, about half the 808s used the version from Japan Radio Co (JRC4558D) while the other half used a version from Texas Instruments (RC4558P), made in Malaysia.

All the DB25 jacks on our analog products use the standard analog audio pinout (sometimes also called the Tascam? or Mackie? pinout). Details on this can be found in the Library. The 6416dio Digital I/O Module, as well as the AES3 module for the PB28 patchbay, provide both Yamaha? and Tascam/Digidesign? pinouts. You can use either but not both at once. Make sure the cables match whichever jack you choose! Links: