I do recall having a VERY early T-4 Reciter that used the 6AU6 instead of the 6HS6. It was a very low serial number (003x).?
Steve Wedge, W1ES
Time flies like an arrow. Fruit flies like a banana.
On Wed, Jan 8, 2025 at 12:59, Kim Herron <
w8zv@...> wrote:
I checked NJ7P's website before I posted this.? the 6AH6 is can be used as a sub for a 6HS6.? Its not directly listed as a sub.? It's listed as a sub for a 6AU6, which is also listed for a 6HS6.? The 6HS6 has a gain of 9500 mU, and the 6AH6 has a gain of 9000 mU.? I've been trading tubes for a LONG time.? In the last 20 years, I think I've seen about 6 6HS6's. I think that I have 2 or 3 right now.? I must has 200 6AH6's on the shelf.? How many would you like???
?
The reason that the 6HS6 is so expensive is because of the gain of the tube and the supply available.? They are also VERY quiet.? Most pentode tubes of that family are noisy and get subbed out for some quiet version if they are being used in communication receivers.? The SP-600 is full of them and the noise floor is awful because of it.? Heathkit used them in their LMO/VFO application in the HW-100/101 and the SB-100/101/102.? If your rig went to Heath for service, that tube got replaced with a 6136.
--
Kim Herron
W8ZV
w8zv at goldenradioservice dot com
