[2359glenn]

Did you guys look at the front page article about the Toolshed Audio Euphoria 45? Wow what a beautiful amp. I don't even want to know it cost, but it sure has presence.

It probably don't sound that different then your amp.
https://head-fi.org/showcase/toolshed-amps-euphoria-stereo-45-dht.22593/reviews

 

[Xcalibur255]

It probably don't sound that different then your amp.
https://head-fi.org/showcase/toolshed-amps-euphoria-stereo-45-dht.22593/reviews

I consider both that owner and myself to be pretty lucky people that we have the amps we have.

 

[Rossliew]

Must be the 45 tubes used that attracted your attention eh, Tyrell

And thanks for the kind input on the Dragon as well.

 

[ru4music]

I consider both that owner and myself to be pretty lucky people that we have the amps we have.

No Doubt (i.e. not the rock band), but I'm in agreement with your sentiments as I have an (EL3N) amp build in the pipeline as well! I love the 45 tube type house sound which is why I've chosen to have Glenn build me his EL3N version. BTW, The pizza/ pictures look amazing (re: previous posters) ... seriously: extremely amazing!!

 

[gibosi]

From a purely visual viewpoint, while the Raytheon 5CU4 doesn't have a sexy ST bottle, it does have a very nice glow, brighter than most.

For now, I am listening to an album I haven't heard before, Carol Welsman, "For You", so can't really say how it compares to other rectifiers.

Over the weekend, I hope to compare it to the 596, which to my ears, is the best American rectifier I own. But at least for this album, I am not hearing anything out of sorts. It seems to be a nice rectifier.

 

[whirlwind]

Love the glow on that 5CU4, that is a sexy tube.

Glenn sent a Hexfred and it arrived last night...I will pop it in this morning and have a listen.

Really digging the sound from the Loewe Radio AZ12, it is wonderful.

 

[ru4music]

Love the glow on that 5CU4, that is a sexy tube.

Glenn sent a Hexfred and it arrived last night...I will pop it in this morning and have a listen.

Really digging the sound from the Loewe Radio AZ12, it is wonderful.

Where are you using the Hexfred, OTL or EL3N?

 

[whirlwind]

Where are you using the Hexfred, OTL or EL3N?

EL3N

 

[Rossliew]

EL3N

Punchy sound you'll get

 

[gibosi]

Show us your project please

A very crude external DC heater power supply consisting of a surplus laptop DC power supply and an inexpensive adjustable step-down buck module converter.

This particular laptop supply is rated at 19 volts, 4.7 amps, which is considerably more than necessary for this project. A common wall wart rated at about 12 volts and 1 amp would be perfectly fine as two 76 or 37 draw a total of 0.6 amps. I cut off the jack, stripped the wires and connected them to the input of the buck converter. There is a set screw to adjust the voltage down to the desired level, in this case, 6.3 volts. (With my old Little Dot, I used to use this type of power supply to heat 8.4 and 12.6 volt tubes.) In the adapter, pins 7 and 8 are disconnected in the base and wires are run from the heater connections to the output of the buck converter. Pretty simple.

Based on my experience so far, this is not a cure-all. A noisy pair of Sylvania mesh plates has less ground hum, but is still unacceptably noisy. On the other hand, the noisy pair of National Union mesh plates pictured a few pages back is now quiet. And I also have a noisy pair of Ken-Rad to try later, but for now, I am enjoying the National Unions.

 

[TonyNewman]

EML 300B XLS - anyone used these beasts in a Glenn amp?

Been wanting to try them, but they are a touch off the standard 300B spec. Heater draw of 1.5A rather than 1.2/1.3 ... etc.

(I would have done a thread search, but that tool seems to be missing after the latest forum upgrade)

EML 300B XLS data

 

[jekjek]

A very crude external DC heater power supply consisting of a surplus laptop DC power supply and an inexpensive adjustable step-down buck module converter.

This particular laptop supply is rated at 19 volts, 4.7 amps, which is considerably more than necessary for this project. A common wall wart rated at about 12 volts and 1 amp would be perfectly fine as two 76 or 37 draw a total of 0.6 amps. I cut off the jack, stripped the wires and connected them to the input of the buck converter. There is a set screw to adjust the voltage down to the desired level, in this case, 6.3 volts. (With my old Little Dot, I used to use this type of power supply to heat 8.4 and 12.6 volt tubes.) In the adapter, pins 7 and 8 are disconnected in the base and wires are run from the heater connections to the output of the buck converter. Pretty simple.

Based on my experience so far, this is not a cure-all. A noisy pair of Sylvania mesh plates has less ground hum, but is still unacceptably noisy. On the other hand, the noisy pair of National Union mesh plates pictured a few pages back is now quiet. And I also have a noisy pair of Ken-Rad to try later, but for now, I am enjoying the National Unions.

Great Job!
I will post my GOTL favorite setup soon after rolling 20 rectifier

 

[Xcalibur255]

A very crude external DC heater power supply consisting of a surplus laptop DC power supply and an inexpensive adjustable step-down buck module converter.

This particular laptop supply is rated at 19 volts, 4.7 amps, which is considerably more than necessary for this project. A common wall wart rated at about 12 volts and 1 amp would be perfectly fine as two 76 or 37 draw a total of 0.6 amps. I cut off the jack, stripped the wires and connected them to the input of the buck converter. There is a set screw to adjust the voltage down to the desired level, in this case, 6.3 volts. (With my old Little Dot, I used to use this type of power supply to heat 8.4 and 12.6 volt tubes.) In the adapter, pins 7 and 8 are disconnected in the base and wires are run from the heater connections to the output of the buck converter. Pretty simple.

Based on my experience so far, this is not a cure-all. A noisy pair of Sylvania mesh plates has less ground hum, but is still unacceptably noisy. On the other hand, the noisy pair of National Union mesh plates pictured a few pages back is now quiet. And I also have a noisy pair of Ken-Rad to try later, but for now, I am enjoying the National Unions.

You're going to be building your own amps before long. Wish I had your drive for discovery in this hobby.

 

[Khragon]

EML 300B XLS - anyone used these beasts in a Glenn amp?

Been wanting to try them, but they are a touch off the standard 300B spec. Heater draw of 1.5A rather than 1.2/1.3 ... etc.

(I would have done a thread search, but that tool seems to be missing after the latest forum upgrade)

EML 300B XLS data

I've been using them for a while.. They are neutral sounding tubes, with character changes depending on the current settings.

 

[gibosi]

Great Job!
I will post my GOTL favorite setup soon after rolling 20 rectifier

You are rolling through 20 different rectifiers?