Official Blackstaramps Forum

Stop shipping your amps with terrible quality tubes!! The first amp I bought was the HT Stage 60, sounded completely dull and like crap until i re-tubed the whole thing. It might be justifiable for a $900. However, recently I re-tubed my S1 104 6L6 and what a significant difference.....everything I...

i think most tube amp users will agree that changing power valves without a bias is a gamble pure and simple you may go years without a problem - you may go 1 hour if it was simply plug and play there would be no pot there to adjust i have done it as well but i still dont recommend it as general ru...

Being a careful owner of moderate intelect I have always changed the power tubes in my own amplifiers, this has never once caused a problem nor has it made them under perform. Nearly all of my 'techy' friends who own valve amps dont bias them when changing power tubes and they've never had problems...

^^^^ the first part i agree with... the second part not so much - i have over the years found that a good tech is worth his weight in gold especially in certain parts of this great land :lol: mine for example (who has been with me for years) charges me generally around 75 bucks to revalve a 2x12 an...

My two cents worth... I wouldn't recommend changing your power valves without having a bias meter and the capability to check and confirm the bias is within a safe range. This is especially due to the fact that modern valves are often, quite frankly, shit. Even the ones that Blackstar fit from facto...

KKND wrote:How would an ECC803s sound for clean or crunch channel?

Any experience?

Thanks

I have some NOS Tesla E83CC which are a copy of the Telefunken ECC803S. I'll give them a try when I have time but it will be through my HT-5 10" boxes.

Awesome. But what makes you come to this conclusion..... A simple process of elimination. Remove V1 and all the channels still work but seem to have a lot less gain so I conclude that this is the first gain stage as all channels still have their respective dedicated gain tubes as per below. Remove ...

I like your approach. +1 Thanks for the info guys Yeah, well maybe my previous post sounded a little vitriolic but I stand by every word. However, I will say that I do love Blackstar products and think that they represent great value and quality for the price, just the attitude towards customers in...

1046L6 update... I believe these are the correct designations for the pre amp tubes... V1 = 1st gain stage V2 = Phase inverter V3 = clean channel V4 = crunch channel V5 = OD1 / OD2 channel This should save some time with tube rolling, now you will know which swap outs will effect which channel. I ho...

Further 1046L6 info... Tested my 1046L6 to get the following readings (useful if you can find a vendor who will match tubes at actual working voltages), the power tubes were in the amp at the time: Plate voltage = 470VDC Screen voltage = 470VDC Grid bias voltage = -53VDC The power amp tube socket te...