Sunday, July 04, 2010

Tube preamplifier with RIAA network

I'm building a preamp kit with JAN6418 tubes (order here).

Day 1 20100702

I received the package from Oatley. After verifying the contents I found that I received 2 resistors of 170KΩ instead of 180Ω, and 4 capacitors with a max voltage of 25V instead of 35V (in a circuit of 30V). The diode delivered was the wrong type and size as well, as were some C's.

Day 2 20100704

I've soldered most of the components on the board. I need to buy some components that were wrong or missing and I need to measure the gain of the tubes to decide where to place which.