April 24, 2024
KT88 6550 SUB NOS JAN 4D32 M/P One Pair replaces 4 X KT 88 tubes
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This eBay listing is for One NOS Matched Pair of 4D32's. Can be used with optional adapters for audio or plug-and-play in the following transmittersCollins 32V-2- Hallicrafters HT-20 and Johnson Viking 1Will replace 4 KT88's in a push pull amplifier.Matched Pair Joint Army Navy 4D32 made for US military in1977/78 100-watt tubeThe 4D32 produce less distortion and have a crisper sound than Conventional KT88/6550sThis listing does not include the adapters you must purchase them separately from the link at the bottom of the pageA pair of 4D32's with KT88/6550 adapters can replace 4 KT88's in a push pull amplifier.Because each 4D32 is rated at 100 Watts it can replace 2 KT88's which are rated at 40 W each (2X40 =80)See photo of tubes in use, in the photo a 100 W guitar amplifier which normally uses 4 output tubes is using 2 X 4D32's with adapters and producing the same power 100 Watts output.You need to know on your amplifier what sockets are the positive and negative half of the sine wave.A safe bet is to use two sockets that are farthest away from each other.In the picture, the guitar amplifiers left 2 sockets are the positive half, right 2 sockets are negative.Because of the increased heater current of the 4D32's you can only use two per channel on a stereo 8 tube amplifier. Or a pair on a 4-tubeguitar amplifier.On amplifiers that
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