The same four resistors that were used in the IC circuit presented earlier are wrapped around the inputs and the output of our output stage, but the wrapping is a little differently laid out this time. This time the resistor that went output ground in the IC example is hooked up to the output. Because the output is in phase with the input at the beginning of the resistor string, the effect load resistance presented by the load is greatly increased by the inverse of 1 minus the gain of the circuit: R' = R / (1-gain). Yes, this means the input impedances do not match between inputs.
Over 10,000 square feet of: Tubes, books, transformers, sockets, friendly folks, capacitors, resistors, literature, cabinet restoration materials, friendly folks, wire, grill cloth, gifts, tools, information...and did we mention the friendly folks?
68 pages of products and information (most of which is also available on our web site). It's all here!