EF Johnson
EF Johnson 50 DD 110, Dual Section 50 pF Each Air Variable Capacitor
- MPN:
- 50 DD 110
- Condition:
- Used
- Shipping:
- $20.00 (Fixed Shipping Cost)
Frequently bought together:
Description
EF Johnson 50 DD 110, Dual Section 50 pF Each Air Variable Capacitor
Part identification: Nameplate (worn but legible in photos) shows CAP μμf ~50, VOLTS 11000, AIR GAP .350, E.F. JOHNSON CO. WASECA, MINN. U.S.A. Type or Cat. No. consistent with 50 DD 110 (or closely related 50CD110 / catalog equivalents such as 152-507 or 152-207). This is a dual-section high-voltage Type D-style unit.Specs (nameplate + your data + catalog matches)
- Brand: E.F. Johnson Co., Waseca, Minn., U.S.A.
- Part / Type Number: 50 DD 110 (also referenced as 50CD110 or catalog ~152-507 / similar)
- Sections: 2 (dual)
- Capacitance: Labeled ~50 pF max per section; your measured range 21–50 pF per section (catalog equivalents typically list 18–50 pF per section)
- Voltage Rating: 11,000 V (11 kV)
- Plate Spacing / Air Gap: 0.350″
- Plates: Typically 8 per section on matching catalog units
- Shaft: ¼ inch
- Dimensions (approx.): Length including shaft 12½″; Width 5½″; Height 5 5/16″ (catalog matches often list ~11″ body length × 5.5″ W × 5⅜″ H)
- Construction: Heavy aluminum frame and plates, ceramic insulators, center support, typical rugged Johnson dual-section design for high-power RF service.
EF Johnson Dual Air Variable Capacitor – 50 DD 110
Genuine E.F. Johnson Co. dual-section air variable capacitor, Type/Cat. No. 50 DD 110 (or equivalent 50CD110 / 152-series). Rated approximately 21–50 pF per section at 11,000 volts with 0.350″ air gap. ¼-inch shaft. Approximate dimensions: 12½″ long (including shaft) × 5½″ wide × 5 5/16″ high. Rugged USA-made high-voltage RF component ideal for high-power amateur radio transmitters, linear amplifiers, or antenna tuners. Ceramic insulated construction.
Genuine E.F. Johnson Co. dual-section air variable capacitor, Type/Cat. No. 50 DD 110 (or equivalent 50CD110 / 152-series). Rated approximately 21–50 pF per section at 11,000 volts with 0.350″ air gap. ¼-inch shaft. Approximate dimensions: 12½″ long (including shaft) × 5½″ wide × 5 5/16″ high. Rugged USA-made high-voltage RF component ideal for high-power amateur radio transmitters, linear amplifiers, or antenna tuners. Ceramic insulated construction.
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