Tubes Asylum

The gain stages in the Jolida are ICs

35.168.9.156

garymuffley

In Reply to: RE: Jolida JD-9 phono preamp posted by posaune32foot@gmail.com on July 10, 2023 at 13:38:00

If you look at a schematic of that unit, all the amplification is done by ICs. The tubes are used solely as cathode followers, which add no gain, and are there so that it can be sold as a tube unit.

Follow Ups:

"all the amplification is done by ICs" Almost true - Tre' 21:21:41 07/11/23 (0)
Certainly all the gain surrounding the phone EQ is from ICs but the last stage of each channel is a so call Totem Pole (or SRPP) made from both halves of a 12ax7 and it does have gain. It is considered one stage but the first triode of the Totem Pole is the gain part and the second triode is a cathode follower output.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
RE: The gain stages in the Jolida are ICs - Triode_Kingdom 20:30:59 07/11/23 (0)
"The tubes are used solely as cathode followers, which add no gain, and are there so that it can be sold as a tube unit."

More and more fraudulent junk like that has appeared on the market over the last few years. Reminds me of the "10 Transistor" radios in the '60 that had four transistors hanging in the wind.

Post a Followup:

FAQ

Post a Message!

Forgot Password?

Moniker (Username):
Password (Optional):
	Remember my Moniker & Password (What's this?) Eat Me
E-Mail (Optional):
Subject:

Message:	(Posts are subject to Content Rules)

Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:	Automagically notify you when someone responds.

To view your new posting or follow-up, click on the RELOAD or REFRESH button on your browser.

This post is made possible by the generous support of people like you and our sponsors:

Kimber Kable