Herbie's Tube Dampers - Which Kind for BHK tubes?

[cardri]

@JMK - I’m using the Rx-9 for PRE and SS-9 for BHK300s… Preamp is tricky, need to make sure there is no touching of the dampener. The BHK300s are even trickier cause of the door and wall they are between. I would not use the Rx-9 on the BHK300; however, the BHKPRE is doable. This link has pics I took.

Holy mother of .... BHK Signature Preamp

Just changed the stock BHK Preamp tubes to “select” tubes. When changing to “BHK select” tubes, Bascom mentions going from 4mA to 5mA bias (current), in addition to going from 12V to 6V. The bias selection is implemented using 2 stakes; connector is only on one stake (4mA). Connecting the 2 stakes with the connector changes the bias current from 4mA to 5mA. Current stakes are near the tube on the right. Below is a pic of the preamp and amp tube rolling process. In addition you can see how the Rx…