hi
see
Amazing sound! My friend corrected the scheme for me. I have collected different amplifiers but for my ears it does not sound better than this amplifier.
see
Amazing sound! My friend corrected the scheme for me. I have collected different amplifiers but for my ears it does not sound better than this amplifier.
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Been on the hunt for EF86 alternatives and found a few good substitutes. E80F seems to work great, sounds identical and is pin compatible. Brimar CV4006/6059/6BR7 may also prove to be a very good substitute with the added bonus being how cheap it still is. It's only downside is the need to rewire the socket. (which I'll be doing tomorrow so I can test them)
Yes E80F working as a pentode input directly coupled to a 6CG7 LTP phase splitter. This is then driving push-pull EL34/6CA7/KT77. (Similar circuit to a dynamo modified mullard 5-20 and the Eico HF60)
E80F is an oddity insofar as it breaks the normal European nomenclature as it isn’t an industrial version of EF80.
Thanks Kei. The E80F may not be an industrial version but isn't it supposed to be a long-life tube?
Heater regulators under test
I designed these PCB's for a heater regulator that can supply 3-10A continuously at 7.5-22V output.
Im testing these now for function, and i gotta say im surprised at how well they function myself.
noise is hard to measure with my fluke 175, and my DSO isnt much help either as the noise is below its noisefloor.
I designed these PCB's for a heater regulator that can supply 3-10A continuously at 7.5-22V output.
Im testing these now for function, and i gotta say im surprised at how well they function myself.
noise is hard to measure with my fluke 175, and my DSO isnt much help either as the noise is below its noisefloor.
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Just a lazy evening with the kit...
Bottom box is a amp/speaker switchbox.
Middle is a nixie clock/DAC/bluetooth/HP amp/input switch with meters...
Top is an IA with phono, 4 inputs, 6E2 peak meters, and 60WPC or triode power...
Bottom box is a amp/speaker switchbox.
Middle is a nixie clock/DAC/bluetooth/HP amp/input switch with meters...
Top is an IA with phono, 4 inputs, 6E2 peak meters, and 60WPC or triode power...
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I'm a big fan of 6E2 magic eye tubes also, I like the nixie tubes, haven't seen those since I was a kid. My dad who was an accountant, had a very early calculator with nixie tubes. Very cool kit indeed.
Bigbottle MM/MC phono preamp, in a Landfall chassis. Really happy with how this came out.
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Here is my recently completed Tubelab SSE. It deviates from the standard built by using an Antek toroidal PSU, soft start board, and input selector plus sub out. This is my 3rd amp build. First was an ACA, second was a class AB solid state chip amp, and now the tube amp for comparison. I must say I am rather taken with the SSE. It is just so pleasant to listen to.
Testing DHT regulator 1.5A model
These are some pictures of my test on the latest batch of boards to come in.
First picture is the slow start characteristic tested with a JJ 300B tube.
These are some pictures of my test on the latest batch of boards to come in.
First picture is the slow start characteristic tested with a JJ 300B tube.
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Those power supplies on your test bench : correct me if I am wrong but these are from Delta Elektronika?
Did you purchase them new or ....
I guess the cabinet they are housing in is your own homework?
Yes they are delta's. Two E015-2 and two of the E018-0.6D I also have a E060-0.6. I used to have 12 of these 30W supplies, but i got a very good price for the E300-0.1L's so those are gone now.
I swapped them with a friend for a EST150. best decision ever as the EST150 allthrough a very clean switcher is still a switcher, and these offer more flexibility.
the cabinet is indeed made out of some scrap wood, i didnt have a rack to mount them in, so i made that cabinet out of scrapwood.
I dont want to drive up the price on these, but for those outside of the Netherlands, these are on par with the HP6XXX series in therms of performance, and Delta hands out the service manual if you ask for it. If you can get the E series lab supplies for under 100USD i suggest you do so. The only thing that ever breaks on these is C1 on the control board, that axial capacitor dries up over time and leads to loss of full output voltage and excessive ripple.
I swapped them with a friend for a EST150. best decision ever as the EST150 allthrough a very clean switcher is still a switcher, and these offer more flexibility.
the cabinet is indeed made out of some scrap wood, i didnt have a rack to mount them in, so i made that cabinet out of scrapwood.
I dont want to drive up the price on these, but for those outside of the Netherlands, these are on par with the HP6XXX series in therms of performance, and Delta hands out the service manual if you ask for it. If you can get the E series lab supplies for under 100USD i suggest you do so. The only thing that ever breaks on these is C1 on the control board, that axial capacitor dries up over time and leads to loss of full output voltage and excessive ripple.
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Is this an optical illusion - looks like the remote control is stuck underneath the bottom unit yet there is no space for it ?
