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Lirpa VDRS GT Dear Editor: After reading about the new Lirpa VDRS (Vehicular Disc Reproduction System) in your April, 1978, issue, I decided to build a GT version of the VDRS myself. Using a Tyco drivetrain and body by Pickering, this model can boast a higher "Album Per Battery" life (APB) using the same titanium-oxide wet cell power source than the earlier models. Also, it is equipped with G 60x1/e" sponge rubber tires for maxi mum traction on even the dirtiest of records. Enclosed you will find a snapshot of my VDRS-GT. The Specs for my GT model are similar to the factory stock version except for frequency response (5 Hz to 50 kHz), pinwheel effect (reduced to-10, thanks to reduced weight), and output (12 watts per channel stereo, 7 3/4 watts mono). This unit works well with the standard Lirpa controller, and it will have to, since I haven't yet finished my own version. I am currently working on a 78-rpm model and also on a 4-wheel drive model VDRS which will track even the most heavily warped records. Speaking for other readers of Audio, I wish Prof. I. Lirpa much success in all his endeavors. -John Huber; Newtown, Penna. Guilt Rewarded Dear Sir: Amazing, just as I was beginning to feel guilty for becoming a video freak an old friend reaffirms the effectiveness of this pursuit--by introducing a column in Audio devoted to same, namely the Videoscenes column. I recently acquired a VTR (VHS format) as a tool in my lifetime goal of improving the state of commercial broadcasting. However, with the new VTR unit, I was dismayed at the lack of technical information which accompanied the booklet of instructions. I am extremely happy to see your new column--now I won't have to subscribe to yet another magazine--and I look forward to such features as "how to clean the heads," "which tapes are best for your unit (brands, not types)," and "the effects of cascading units for editing." Incidentally, owners of VTRs who have not already done so may find it fun to experiment with the TV sound by patching the VTR into their audio system. -Jeffrey Rocchio; Boulder, Colo. Records for Rehab Dear Sir: My wife and I do volunteer work at a home for retarded adults, and we have found that it is an excellent place for donating used records. Many of these people have a real love for music and many even have their own turn tables. I thought, perhaps, your readers might be interested in this use for their old records. To locate a home for retarded adults in your area, you only need to contact the local social services office and they will be glad to give the information to you. -Virg Friebel; Ball Aerospace Systems, Boulder, Colo. Editorial Error Dear Sir: We'd like to point out an error on page 137 in the November, 1978 issue of Audio, in the Classical music section of your magazine. In Edward Tatnall Canby's most welcome review of Michael Murray Playing the Great Organ in Methuen Music Hall and the Telarc direct-to-disc recording, the disc is available through Audio-Technica dealers, not Discwasher. Audio Technica has been handling all Telarc audiophile discs starting with the Michael Murray release. -Nathan J. Silverman Chicago, Ill. Errata In the December, 1978, issue of Audio there were two mistakes in the Equipment Profiles: For the AKG P8ES phono cartridge, the correct separation figure at 1 kHz is 28.5 dB, not 21.5 dB as stated. For the Satin M-18BX moving-coil phono cartridge, Fig. 2, the S-W response was turned 180°. (Source: Audio magazine, Feb. 1979 ) = = = = |
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