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Hifi Stereo Review â July 1958 - Vintage Vacuum Audio
Hifi Stereo Review â July 1958 - Vintage Vacuum Audio
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stereo's standard!<br />
Model 505 Stereo Control with dualchannel<br />
magnetic adapter<br />
Price $11.50 Net<br />
M odel504 single magnetic Adapter<br />
only . ............. Price $3.60 Net<br />
Model 21D Stereo Cartridge with<br />
Diamond Stylus . . . Price $19.50 Net<br />
M odel21S Stereo Cartridge with<br />
Sapphire Stylus . . . . Price $9.90 Net<br />
Model 26DST Stereo Turnover to 78<br />
Monaural, Diamond and Sapphire<br />
Price $22.50 Net<br />
M odel26ST Stereo Turnover. t~ -78 ' 1<br />
Monaural, Two Sapphires<br />
Price $12.90 Net<br />
Good stereo depends on these vital features:<br />
Range Response: 20-16,000 cps<br />
± 2~ db to RIAA; Distortion: Less<br />
than 2%; Channel Isolation: 20 db;<br />
Vertical Rumble Rejection: 15 db with<br />
5 meg input; Elements: dual ceramic,<br />
(lead-zirconium titanate); Weight: 21D<br />
2.4 grams, 26DST 2.6 grams; Tracking<br />
Force: 6 grams; Stylus: 21D-standard<br />
.7 mil diamond; 26DST-standard .7<br />
mil diamond-standard 3 mil sapphire;<br />
Vertical Compliance: 2 x 10- 6 em/dyne;<br />
Lateral Compliance: 2 x 10- 6 em/dyne;<br />
Output: .5 Volt RMS from Westrex<br />
standard RIAA Test Record; Capacity:<br />
500 mmfd per element for stereo; 1000<br />
mmfd paralleled for monaural; M ounting:<br />
EIA (RETMA) standard Wand<br />
7/16" centers; Recommended Amplifier<br />
Input Impedance: 5 megohms or<br />
higher.<br />
the Electro-Voice totally compatible stereo cartridge<br />
Thousands being installed as original equipment attest to industry acceptance; thousands in use prove its unquestioned<br />
superiority for monaural as well as stereo. The E-V Stereo Cartridge uses a .7 mil replaceable stylus and dual<br />
high fidelity ceramic elements so essential to the exacting demands of stereo reproduction. Pickup from stray magnetic<br />
fields is non-existent, hum and rumble are far below the level of even the most expensive magnetic cartridges, and<br />
PZT ceramic elements deliver a precise RIAA curve. The E-V Stereo Cartridges exclusive Rumble Suppressor<br />
(pat. pend.) virtually eliminates vertical turntable rumble without degrading full frequency response range of the<br />
cartridge ... allows you to use it with any turntable or record changer. Totally Compatible ... for stereo, it's superb;<br />
for monaural ... it's superior to even your present cartridge.<br />
THE FIRST STEP TO STEREO. Many fine monaural cartridges are too "stiff" to play stereo records without<br />
seriously damaging them; therefore, ifydu replace your .present cartridge with the new E-V -Compatible Stereo<br />
Cartridge, you may continue playing your present library of LP's plus all the new stereo records monaurally.<br />
THE SECOND STEP TO STEREO. Connect the E-V Stereo Cartridge leads to the 505 Stereo Control Center<br />
(net $11.50). You can then select from "monaural," "stereo," or "channel reverse"for easy balancing. The 505 also<br />
converts your magnetic input to high impedance ceramic input, if required. Run one lead to your present high fidelity<br />
system, run the second channel lead to a second amplifier (and speaker). NOTE: The E-V Stereo Cartridge is corrected<br />
for RIAA curve, doesn't need the equalization of a second preamplifier.<br />
If you do not plan to purchase a second amplifier and speaker now, you can still get stereo by running the second<br />
channel lead through the 505 to your radio or TV set phono input. You can improve your system later by<br />
adding a second amplifier and speaker. Stereo records are available now. Why wait? Enjoy the vivid reality of<br />
phonic sound today. Whether you're pUr
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