[Noobmachine]

Since it seems that no-one around here has any real impressions about the Tr-07hp, I've decided to jump the gun on one, and have just placed an order with Shikada San! Will be sure to share impressions once I get my hands on them

 

[bmichels]

I have a question for tubes specialists:
 
I am looking for a pair of (matched if possible)  Western Electric WE417A driver tubes for my EC445 amp;
 
I found may be a pair, and I see that the vendor mention:   417A WE NOS (439=1954)  best single (Gm=25,000) strongest single tube
 
--> what does  Gm=25,000  mean  ? Is the highest the better ?   do those values need to be very close for the tubes to be considered as "matched" ? or is matched based on something else ? 
 
--> and I guess (439=1954)  mean "produced in 1954" ?
 
 
by the way, if someone can tell me where I can get those rare tubes.... 

 

 

[bmichels]

A quick note to say that, after break-in, the TEN + Telefunken diamond base berlin df96 are.... exquise combo 

 

 

[ianmedium]

They really are aren't they!

 

[bmichels]

They really are aren't they!

 
Yes, they are 

 

 

 

  and also 

 

 

.  So, thank you again for your advices 

 

[Richsvt]

Any impressions on the new portable TU-07? Curious as to what the transistor only amp from A2P sounds like...

I am very curious to see how this sounds. I saw that this is just coming out so will keep an eye in this. Also have my eye on the TUR-06. Big decisions to be made. If anyone gets there hands on the 07, please post. Trying to weigh if I want to dip my toes in the tube realm...

 

[daveyston23]

This is probably a stupid question but: why are the grills around the tubes removed in the TU05? Is it to reduce the build up of heat? Is it just for looks?

 

[AnakChan]

  This is probably a stupid question but: why are the grills around the tubes removed in the TU05? Is it to reduce the build up of heat? Is it just for looks?

 
These don't generate much heat. The glow is actually an LED underneath. However the grill protection is really to prevent anyone knocking and breaking the tube glass.

 

[daveyston23]

Thanks Anak. That makes sense

 

[nevin]

Hi guys! I am reading (sometimes just scanning) through the pages and I am now at page 132 but time wise I am still at 2013.... tons of tubes info here .

I am using AK240 with IEM and would like to try on tube amp. I am eyeing on TUR-06 but thinking if TU-05 is more fun to play with (and sound wise)?

 

[audionewbi]

I am still waiting for my TR-07hp, 3 months and going strong. 

I have been reading about S.I.T technology and I am not sure why it was discontinued as all the work I have read (mostly DIYer) rave on how it is great for audio enthusiast products. 

 

[Noobmachine]

  I am still waiting for my TR-07hp, 3 months and going strong. 

I have been reading about S.I.T technology and I am not sure why it was discontinued as all the work I have read (mostly DIYer) rave on how it is great for audio enthusiast products. 

 
Same here, my unit is #012, and should be done by mid April (I hope...) 

 

[audionewbi]

Mine should be around the same time. I've asked for low impedance, rechargeable batteries, voltage version, what is your amp?

From what I understand there is low quantity of SIT and once they are finished they are gone for good.

 

[Noobmachine]

Basically the same deal, except I'm running it in low impedance, current mode (which basically kills battery life) and double battery capacity. I'm currently trying to see if I can get a recharging circuit built in as well. 
 
I'm still not all that familiar with the SIT stuff, I'd love to read up on the literature of the subject, but I'm no engineer by trade, and my knowledge of electronics is fairly basic.

 

[muah]

I am

Same here, my unit is #012, and should be done by mid April (I hope...) 

I am #13!!!