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238 [2007/02/19 04:26] n5na |
238 [2019/03/03 21:13] (current) n1eu [Mods & Tips] |
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===== Reviews ===== | ===== Reviews ===== | ||
*[[http://www.eham.net/reviews/detail/212|eHam]] | *[[http://www.eham.net/reviews/detail/212|eHam]] | ||
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+ | ===== Mods & Tips ===== | ||
+ | *[[238dialcord|Dial Cord Replacement]] | ||
+ | *[[238no12v|Eliminate the Need for 12v]] or Unlimited Bulb Life! | ||
+ | *[[http://n6ie.com/Ten_Tec_238.html|N6IE High Power Improvement Mod]] | ||
+ | *{{238turns.jpg?100|}} Many owners have replaced the dial cord with various turns counters (MFJ-TC12 used here by Tom K0SN) | ||
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+ | ===== Additional Information ===== | ||
+ | *[[t_vs_l|Explanation of "L" Network vs. "T" Network]] by Scott Robbins, W4PA | ||
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+ | ===== Brochures ===== | ||
+ | {{238brochure.jpg?100|}} | ||
===== Specifications ===== | ===== Specifications ===== | ||
- | ***CIRCUIT TYPE:** Modified "L" Network | + | ***Circuit Type:** Modified "L" Network |
- | ***Maximum RF POWER:** 2000 watts with a load impedance of 3000 ohms | + | ***Maximum RF Power:** 2000 watts with a load impedance of 3000 ohms |
- | ***FREQUENCY RANGE:** 1.8 to 30 MHz | + | ***Frequency Range:** 1.8 to 30 MHz |
- | ***OUTPUT MATCHING RANGE:** At least 10:1 SWR, any phase angle. | + | ***Output Matching Range:** At least 10:1 SWR, any phase angle. |
***Maximum Impedance, Balanced Feedline:** 500 ohms | ***Maximum Impedance, Balanced Feedline:** 500 ohms | ||
- | ***INPUT IMPEDANCE:** 50 ohms, nominal | + | ***Input Impedance:** 50 ohms, nominal |
***Input/Output Connectors:** Input and four antenna coax connectors are SO-239, UHF type. Studs with wing nuts for single wire and balanced feeders. | ***Input/Output Connectors:** Input and four antenna coax connectors are SO-239, UHF type. Studs with wing nuts for single wire and balanced feeders. | ||
***Variable CAPACITOR VOLTAGE RATING:** 3.5 kV | ***Variable CAPACITOR VOLTAGE RATING:** 3.5 kV | ||
***Inductance:** 28 uh silver plated roller inductor | ***Inductance:** 28 uh silver plated roller inductor | ||
- | ***SIZE:** HWD (in inches) 5.5 x 13 x 11 (13.9 x 33 x 27.9 cm) | + | ***Size:** HWD (in inches) 5.5 x 13 x 11 (13.9 x 33 x 27.9 cm) |
- | ***WEIGHT:** 9 lbs (4.1 kg.) | + | ***Weight:** 9 lbs (4.1 kg.) |