Anyone Rolling Tubes In The BHK 250/300’s?

[audiophilehi]

I see a lot going on with rolling tubes in the BHK PRE. Is anybody rolling tubes in the BHK 250/300?

Personally I’m a big fan of the Gold Lion tubes so I’m most likely staying put with them in my BHK 300’s. I might even roll some Gold Lions in my BHK PRE.

Thanks

[drarifakhtar]

In case you haven’t seen there are a few threads here:

BHK Preamp tube rolling

After a bit of a search, I haven’t found much about tube rolling experience with the Preamp. It would be interesting to hear what changes have been noticed switching out of the stock tubes to, say, the Tungsram.

BHK Signature 250 or 300 Tube Rolling

I understand PS Audio’s tube selection is limited to new tubes. I, however, just purchased three different sets of quads: (1) Siemens ECC88 (6DJ8); (2) Amperex 6922 (Holland) and (3) Amperex ECC88 Bugle Boys with the Halo Getter. Does anyone have experience with these tubes? How long do you have to burn in a tube before listening to them to determine which ones sound better? Any other thoughts on tube rolling? Mark

BHK amp or preamp tube rollers

I just picked up a BHK 300 pair. So I waned to hear from others who rolled the tubes. What did you settle on?

Personally I like the actual tubes that come with the amp like yourself. I have some Mullards and some others that I ordered (will post the type when I can find it) that are NOS. To be honest I didn’t really think they were better than the stock tubes - maybe they need running in more to differentiate. Anyway I don’t want to waste the ones that I have so will wait until they stop performing well before I properly use the NOS tubes.

[audiophilehi]

I did a search on BHK 300. Jeez…how the heck did I miss them.

Thanks so much.

[drarifakhtar]

No problem. If you know any good European/UK tube dealers or come across some please let me know as I’m finding it hard to find much variety here.

[watchdog507]

I posted this in the other thread:

Langrex:

Radio Valves, NOS Tubes & More - Langrex UK

I’ve bought Mullards and Brimar here.

[drarifakhtar]

Thanks I will check them out!

[cardri]

@drarifakhtar - JAN, 2019 rolled PC88s for the BHK250 w/ Herbies dampeners. If you search I posted pics; need to be careful on adding dampeners for the BHK 250/300; restrict them from touching door & interior wall. After ~400hrs they settled in lovely. I had ~1350hrs on the BHK250 and loved the sound with the PC88 tubes…

Pics: Has both PRE & AMP, Title is PRE

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…

APR, 2019 - Just rolled PC88s for my new BHK300s w/ same Herbie dampeners. They have ~150hrs and are starting to unfold nicely.

[drarifakhtar]

Thank you for the recommendation I will take a look hopefully can find some near me. I already have some dampers that fit but I will definitely be looking to get some of Herbies too!