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Schiit Lyr - The tube rolling thread - Page 480  

post #7186 of 8735

is no mebeerchug.gif

post #7187 of 8735

Just found these up in the magic attic.

 

Valvo, 1959, Hamburg, PCC88, D-getter

 

 

 


Edited by sceleratus - 5/10/13 at 5:53pm
post #7188 of 8735

Ok....

The valves pictured above....

I wasn't going to buy them but they were toooo cheap to pass up and I got to check two boxes in one purchase.

Valves from Deutschland and Valves made in the 50's.  I didn't have either.

 

No way I thought they would touch the RTC's

 

This glass should be illegal. eek.gif

post #7189 of 8735
Quote:
Originally Posted by sceleratus View Post

Ok....

The valves pictured above....

I wasn't going to buy them but they were toooo cheap to pass up and I got to check two boxes in one purchase.

Valves from Deutschland and Valves made in the 50's.  I didn't have either.

 

No way I thought they would touch the RTC's

 

This glass should be illegal. eek.gif

That good, huh? wink_face.gif

 

Cheers!beerchug.gif

-HK sends

post #7190 of 8735
Oh. My
post #7191 of 8735

Not sure if they are the same, but i snagged a pair of Valvo D getters real cheap, used though so might not have a lot of life left, but still, can't complain at the price.

 

http://www.ebay.co.uk/itm/140949162743?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

post #7192 of 8735

A whole lot of socket savers turned up today.

 

 

 

I'll set to work making some of my adaptors tomorrow.

post #7193 of 8735
Quote:
Originally Posted by R Scott Ireland View Post


+1 Tubemonger socket savers - excellent. I use both Noval and Octal ones and they make tube rolling much easier. Almost a required accessory for the Lyr, but very beneficial with other amps too.

+1 Herbie's tube dampeners (I like the Rx version with the soft grommets).

 

Personally, I think good feet on the amp itself is more important than either of the above. I use these Sorbothane feet and am pretty happy with them-

 

http://www.amazon.com/gp/product/B003IMSIBA/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B003IMSIBA&linkCode=as2&tag=tt-20

 

They are really sticky though so I cut little squares of plastic wrap and put that in between the tabletop and them, works great. 

 

This not to say the socket savers and tube dampeners don't help but good vibration reducing feet do more to de-couple the amp from the tabletop/shelf. I personally don't use tube dampeners because I think I have enough vibration dampening with the socket savers and Sorbothane feet. Plus, I don't like way the tube dampeners look. 


Edited by phototristan - 5/11/13 at 6:19pm
post #7194 of 8735

I've started on my converters today, thought i'd post a little tutorial if anyone fancies a go themselves instead of buying them from me.

 

We start off with one cheap chinese socket saver, i managed to buy 20 of these for about £16, so not much each really.

 

 

We need to take it apart and cut off pins 5+9, and then bridge pins 4+5 together with a blob of solder.

 

 

Next, i have put it back together so you can see which pins have been cut. This will be the top part of the adaptor.

 

 

We actually need to use pin 5 in the socket, but we cut off pin 5. So we need another socket saver and a simple modification, taking one of the pins we cut off, we need to insert it into pin 5 in another socket saver and solder into place. I overfilled it with solder so we have something to solder our wire to when we correct the internal connections, but this presents a problem because now when we put other socket saver on top, big blob of solder is in the way.

 

 

We just need to drill out a bigger hole in the top socket saver to accomodate the solder and let everything sit flush.

 

 

Here's some tops and bottoms i prepared earlier...

 

 

Now we need to mount top and bottom together, and then put some electrical tape around them to keep everything lined up while we work on the next stage.

 

 

 

 

Now it's taped together we can unplug the top bit so we can get to the inside.

 

 

Now we need a small piece of wire.

 

 

Strip the ends.

 

 

Solder it to pin 5.

 

 

Other end solders to pin 9 that we cut off, now we can re-assemble and test our handiwork.

 

 

Need a multimeter, mines only a cheapo but it does the job, we need to do a continuity check to make sure everything is connected where it's supposed to be with no shorts.

 

 

 

Bridge pins 4+5 together and we should hear beeping.

 

 

Can't show the next bit properly, need 3 hands, but insert a probe into pin 9 in the top, and then somehow hold it there will touching the other probe to pin 5 on the bottom, again should hear beeping.

 

 

 

Everything checks out, that means our adaptor is complete.

I intend to remove the electrical tape because it's not really an ideal long term fastening, i've got some heat-shrink tubing on the way that is glue lined, that stuff should give the adaptors a better finish and hold them together for a long time, should get that next week sometime and will give me a chance to play with my new heatgun biggrin.gif

 

Here's my nice and messy workspace while i was doing the adaptors.

 

 

 

I'll be putting the adaptors on ebay soon for about $5 a pair, this is a little bit less than what it cost me to make them, but only a little bit, so i don't mind.

It will let you use the following tube types in your Lyr:

 

E80CC

E81CC

E812CC

E813CC

ECC81

ECC82

ECC83

ECC801S

12AU7

12AT7

12AX7

12DT7

 

Probably more that i can't remember.

 

They will be running out of spec, but people have been having success with PCC88 and ECC85 and those aren't specced for the Lyr either wink.gif

 

These will be available once i get the heatshrink tubing and finish them off.

post #7195 of 8735
That would allow the curious to try out some cheap, slightly out of spec tubes. Neat. These are known as tube flippers? You'd have to be careful and remember not to accidently roll in a 6DJ8!
post #7196 of 8735
Quote:
Originally Posted by NightFlight View Post

That would allow the curious to try out some cheap, slightly out of spec tubes. Neat. These are known as tube flippers? You'd have to be careful and remember not to accidently roll in a 6DJ8!

 

Yeah that could be bad, using a 6DJ8/ECC88 in these would mean the shield is connected to a heater supply, don't know how that would end up, either tube goes pop or Lyr goes pop i reckon.

post #7197 of 8735

Anyone made any changes since the Bifrost Uber upgrade?  

 

I was finding most of my previous tubes too bright since the upgrade and have moved back to my trusty 1965 6BZ7 GE set.

 

Dunno where or if I will try my luck again.

post #7198 of 8735

Ahh, eBay strikes again.

 

Received a set of Telam ECC85s today... from Poland... in an envelope, not a box... the tubes weren't even in boxes, and they had basically one layer of almost-entirely-popped bubble wrap around them.  

 

Somewhat surprisingly, they're intact.   I haven't had a chance to roll them in yet to see if they still work.... hopefully they will.

 

 

    -Mike

post #7199 of 8735
Quote:
Originally Posted by mhamel View Post

Ahh, eBay strikes again.

 

Received a set of Telam ECC85s today... from Poland... in an envelope, not a box... the tubes weren't even in boxes, and they had basically one layer of almost-entirely-popped bubble wrap around them.  

 

Somewhat surprisingly, they're intact.   I haven't had a chance to roll them in yet to see if they still work.... hopefully they will.

 

 

    -Mike

I hope they work for you...

 

Cheers!beerchug.gif

-HK sends

post #7200 of 8735

Good news!  :-)

 

Not only do they work, they sound amazing.   Easily holding their own against the much more expensive stuff in my collection.   '68 Amperex 7308s, RTC/Amperex E188CCs, early 60s Mullard 6DJ8s, CV2493s and a few others.

 

On another note, I've come into a fairly large quantity of tubes that will work in the Lyr of various types/brands.    I'm ordering a tester today and will hopefully putting a bunch of reasonably-priced tubes up for sale in the next few weeks.

 

 

       -Mike

 

 

 

 

 

Quote:
Originally Posted by HK_sends View Post

I hope they work for you...

 

Cheers!beerchug.gif

-HK sends

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