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The manual was very clear and contained all the information I was looking for. My dishwasher is working again because of this servicemanual!
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Quality scan, great manual. I solved my problem with this manual.
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The AKAI 1720 model reel to reel tape recorder described in this Manual is quite an old unit - circa late 1960's. As a consequence, the description of the mechanical details - and adjustments thereof - is quite critical. The manual does this quite well. The schematics are also well presented and have detailed PCB overlays. Probably the only negative is that some half-tone detail has been lost from the original manual as it has been scanned in simple B&W.
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I got your link from a friend and I must say that I am really satisfied with your service. Specially this B&O manual I didn't find anywhere on the web... but you could deliver it :-) . You deliver very fast and the copy is of good quality. So your webpage is bookmarked. Thanks
Philips Semiconductors
Two-tone Linearity in a 900 MHz Silicon Bipolar Class AB Ampli�er
4 CONCLUSION
Application Note AN98026
Using the typical characteristics of a silicon bipolar transistor in the class AB mode, it is possible to improve IMD for medium and high output power levels by adding a series resistor in the base bias network. This simple and reliable method allows the power amplifier to be operated in the class AB mode, which increases amplifier and overall system efficiency considerably. The presented class AB amplifier shows an IMD performance of better then �32 dBc over a 40 dB dynamic range up to 10 W PEP. This performance makes it possible to use the amplifier in a feedforward system, meeting a �60 dBc IMD requirement. The trade-off is a slight increase in gain compression over the total dynamic range. A good selection of Icq and the series resistor value will give a usable compromise. 5 REFERENCES
1. Philips Semiconductors data sheet. BLV910 UHF Power Transitor. 2. P.B. Kenington, �Efficiency of Feedforward Amplifiers, IEEE Proceeding-G, Vol. 139, No. 5, October 1992, pp. 592-593. 3. Eid E. Eid, Fadhel M. Ghannouchi, Francois Beauregard, �Optimal Feedforward Linearization System Design,� Microwave Journal, Vol. 38, No. 11, November 1995, pp. 78-86. Korne Vennema received his B Eng degree in electrical engineering from the Hogere Technische School in Utrecht, the Netherlands in 1987. In March 1987, he joined Philips Semiconductors in Nijmegen, the Netherlands, where he worked as a development engineer on the design of RF power transistors. Since July 1993, Vennema has been with Philips Semiconductors, Slatersville, RI, as an RF application and product engineer.
1998 Mar 23
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