Wow, my tubes have been magically transformed into super tubes thanks to this tweak: https://pearl-hifi.com/03_Prod_Serv/Coolers/Coolers.html Just kidding, but they look pretty cool (ha!) and I can definitely feel a steady stream of hot air rising from the tube now (haha!).

Shhhh!

Frankentube testing day 2 of 2: The Frankentube I found to be the best in my small collection (I have 3, the winner is one labeled Philco) went up against my 6SN7 champs today... - Mullard ECC33. The Frankentube has a an amazing sound, with incredible clarity in bass and treble, but this...

My testing today leads me to agree with you...the non-Frankie 7N7 sounds great, but dropping in a real Frankie reveals the non-Frankie is a bit thinner in the bass area and not quite as exciting. Not bad at all though. The Philco Frankentube I'm comparing it to was about $6 (cheaper than the...

Yes, I have a tester, but it is being calibrated/repaired at the moment. After a bit more testing, I think that tube is just a bit weak (it probably won't test very well). When I switched in my other Frankentube (labeled Philco, but meeting all the requirements in the original Frankentube...

I noticed something a bit odd this morning while listening to a Frankentube (well, it's a very tall 7N7 with a chrome top and metal base, at least): the bass seemed a bit light, but I kept listening, then about 30 minutes later I noticed the tube was running quite hot, so I put a...

Another question: has anyone tried an ECC32 lately? How did that turn out?

Just out of curiousity, could someone here familar with electrical engineering explain why similar tubes (e.g. Sylvania 6SN7 vs. Ken-Rad 6SN7) sound different (in particular, differencs in, say, bass or midrange)?

Just reiterating my thoughts on the (relatively cheap) ECC82 (I have two Telefunkens that were $18 each on eBay a few months ago)...this tube sounds very, very nice. Detailed, good bass, solid midrange (I'll leave the highs to someone else...my ears are a bit old). Not much warmth like the...

How did you guys know that I keep my weed in it? So which strains make the Lyr 3 sound best? Should we start a Lyr 3 joint rolling thread?

My understanding is that the ECC33 is a very close match to 6SN7 and can be used safely in a Lyr 3 (I've run quite a few for quite awhile in mine). The ECC32 (probably best known for the Mullard coke-bottle shaped tube) has different electrical characteristics (somebody here can elaborate I'm...

I've said it before, but just adding to the current discussion about the Mullard ECC33...this tube is amazing! I've been listening to all sorts of tubes this week at work (RCA red base 5692, KenRad JAN-CKR, Sylvania 3-hole Bad boy), but after popping in the Mullard this morning I'm hearing new...

Bride of Frankentube? https://www.ebay.com/itm/2-new-tubes-EL34-6CA7-RFT-Telefunken-Germany-matched-pair/382833658564?epid=805288596&hash=item5922aa0ac4:g:qL0AAOSwDXxcgjny Not sure if they can be adapted to a Lyr 3, but they look interesting.

What if everyone in this thread chipped in? https://www.ebay.com/itm/Matched-Pair-of-Standard-Sweden-33S30-5692-6SN7GT-NOS-NIB-Vacuum-Tubes/323700155462?hash=item4b5e086446:g:jHgAAOSwLeFcP7s-

I've been using CanOpener for awhile and I agree that it really opens most headphones up. In addition to effects like what CanOpener gives you (which can vary from one music style to the next, so I tend to run with minimal modifications, or just turn it on and off as needed with JRiver's easy...

Who’s going to jump on this before it disappears?!? https://www.ebay.com/itm/Standard-Radio-Sweden-33s30-A-Tube/292963185441?hash=item4435f77321:g:MtwAAOSwWTZcZjzh

What about these? ;-) https://www.ebay.com/itm/Marconi-B65-6SN7-/254008629469?hash=item3b241818dd%3Ag%3ApUkAAOSwosdcA-n5&nma=true&si=Vf9W2xUZ057I6oLa8J154lXvqV4%253D&orig_cvip=true&nordt=true&rt=nc&_trksid=p2047675.l2557...

I'm listening to a Marconi B65 (with "Made in Holland" on the glass) this morning and it is sounding fantastic. Here's a tip on getting tubes like this on eBay (that's where I found mine): sometimes the seller doesn't bother putting "6SN7" in the description, so make sure you search for B65...

Update on my tube rolling (which was on hold for a couple of weeks): - Mullard ECC33 is still my favorite. Perfectly clear, wonderful detailed bass, and that warmth. - Shuagang CV-181Z. Not a bad tube, but not terribly exciting. The bass seemed a bit dull and restrained. The highs seems...

I do have a Brimar CV1988. :) $38 from nova.76 on eBay. I highly recommend that seller because 1) he auctions most tubes with a low starting price (no comment on how one can exploit this), and 2) his tubes are some of the best I own. I got a TungSol round plate from him a few days ago for...

Update on troublesome Lyr 3 and some tube observations: The volume problem I'm having with the Lyr 3 has resulted in a warranty claim (at Schiit's request). I'm not sure whether or not that means no Lyr 3 for awhile or not (maybe they'l just send a replacement? We'll see). However, on Low...

I'm resurrecting this old thread because I'm having a similar channel imbalance problem with my 3-month old Lyr 3. Basically, starting yesterday (it had been fine until then) the right channel gets significantly louder than the left channel at 10 o'clock (lower volume settings sound fine) on...

Ugh, I think that Foton tube did something, hopefully just oxidation, because now I'm hearing this problem with several tubes. Some more details...at around 10 o'clock on the volume knob (for both low gain and high gain) the right channel suddenly becomes 10db or so higher in volume than the...

Yes, when I decide to switch tubes I turn the Lyr 3 off, unplug it, then wait for the tube to cool (I use the back of my pinky, which is sensitive to heat, to check it...yes I wipe the glass off with a cloth after removing it, and I use a cloth while inserting it). I've really only had one...

I'm comparing my other Russian 6N8S, a Foton with a black base from 1952, and I'm noticing the Foton has a dropoff in volume in the left channel at around 10 o'clock on the volume knob when on High Gain. I switched the Lyr3 to Low Gain (which requires the volume to be around 12 o'clock) and the...