UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Heathkit OS-2 Oscilloscope

orbanp1 · 21st May 2021, 3:53 pm

Hi Thorvald,

Here is an "interpretation" of the C2 pre-amp.
The OS-2 has a bandwidth from 2Hz to 3MHz.
The pre-amp has a gain of 40dB (100) and a bandwidth from 1Hz - 3.4MHz.
It starts clipping above 20mV RMS input.
You need to provide the 12V supply, the current draw is about 5mA.
The simplest (and safest) would be using a small extra transformer for it.

Regards, Peter

21st May 2021, 3:53 pm	#8
orbanp1 Heptode Join Date: Nov 2009 Location: London, Ontario, Canada Posts: 675	Re: Heathkit OS-2 Oscilloscope Hi Thorvald, Here is an "interpretation" of the C2 pre-amp. The OS-2 has a bandwidth from 2Hz to 3MHz. The pre-amp has a gain of 40dB (100) and a bandwidth from 1Hz - 3.4MHz. It starts clipping above 20mV RMS input. You need to provide the 12V supply, the current draw is about 5mA. The simplest (and safest) would be using a small extra transformer for it. Regards, Peter Attached Thumbnails Last edited by orbanp1; 21st May 2021 at 3:59 pm.