Description: Collection of parts that will fit the 3-500Z socket mounting holes in Kenwood TL-922 or Heathkit SB-220 linear amplifiers. Tubes are properly cooled to better the max spec of 200 degrees C 392 degrees F for the tubes.Tube cooling spec is 24 cubic meters/hour/tube or 15 cubic feet/minute/tube. Out the cooler duct size at 440 linear feet/minute is 25.5 cubic meters/hour/tube. Kenwood stock fan will remove 414 cubic meters/hour. Included is hi-temp silicone ring good for 450 degrees F. Loaded deformation temp of PVC is 200 degrees F. No PVC deformity has been found so far. Fan is 12VDC 4 pin. Full speed with yellow + and black -. Tachometer output and PWM input options. Re-tap Kenwood filament transformer from 120v to 100v to bring 10VAC filament supply to over 12.6VAC for Russian tubes. Fan holes must be drilled larger to accommodate imperfect Kenwood to fan alignment. Holes punched in bottom for fans are a clean 3". 2.5" might even be better. I have a hydraulic punch for either size hole. Search Ebay for KK4NOZ & send yours in for punching. Working great as a beta design so far at 1000-1200 PEP. Package includes everything in first main picture. Some pictures are GI-46b components, auction is for GI-7 socket. Tube and cooler not included. Get quantity 2 for dual tube setup.
Price: 235 USD
Location: Dadeville, Alabama
End Time: 2024-01-30T21:59:17.000Z
Shipping Cost: N/A USD
Product Images
Item Specifics
All returns accepted: ReturnsNotAccepted
Model: GI7 chimney
Type: Power Amplifier
Brand: Kenwood
