UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Merlin · 5th May 2006, 8:17 pm

How do you mean floating?
The problem with big caps is that they can lead to blocking distortion because they, um, have big capacities! Also, passing very low frequencies can lead to oscillation in the following stage- a problem in vintage long-tailed-pair designs. -Ignore the data sheet at your peril!
A 47n & 220k rolls off at 15Hz anyway, plenty low enough. 0.47u & 1M is practically letting DC through!

5th May 2006, 8:17 pm	#8
Merlin Retired Dormant Member Join Date: Apr 2006 Location: Shrewsbury, Shropshire, UK. Posts: 67	Re: Miniamp prototype 1 How do you mean floating? The problem with big caps is that they can lead to blocking distortion because they, um, have big capacities! Also, passing very low frequencies can lead to oscillation in the following stage- a problem in vintage long-tailed-pair designs. -Ignore the data sheet at your peril! A 47n & 220k rolls off at 15Hz anyway, plenty low enough. 0.47u & 1M is practically letting DC through!