Tubelab 300b single ended tube amplifier build - Amplifiers

AudioPhill

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Age: 56
Location: Essex uk
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Tubelab 300b single ended tube amplifier build

« on: April 28, 2019, 08:51:36 PM »

Purchased a Tubelab se board from Tony( floppybootstomp) late last year but only finished about a month ago, my first amp build and loved every minute building it, had a few teething problems along the way, overheating dodgy MOSFETs ( beware eBay, better ones from RS) and a rectifier tube cooked by dodgy Fred diodes but found loads of help through the tubelab website and on the diyaudio forum site so now alll sorted. It has Hammond transformers throughout, a TDK volume potentiometer, 4 inputs and Harmonix 300b output valves. Built a ply cabinet veneered in satin walnut and finished with black gloss acrylic to match my phono stage.
Sounds tremendous and getting better all the time, I tried some more efficient KEF Corelli speakers as thought would be better suited than my Mission 737r speakers but the missions still sounded better and a bit louder, just picked up some interdyn Bt 1 floorstanders which sound awesome with it. Very happy and next project will be speed controller for the ptp. Photos are from when I first finished it and during testing stages, hence the power cable speaker wires.


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Phill

floppybootstomp

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Re: Tubelab 300b single ended tube amplifier build

« Reply #1 on: April 28, 2019, 09:16:06 PM »

Very good looking and well built Sah icon_thumright

Damn, makes me want to build one (mustn't, enough is enough is enough... wink

)

Good to see the board going to good use.


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My real name is Tony

AudioPhill

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Re: Tubelab 300b single ended tube amplifier build

« Reply #2 on: April 28, 2019, 09:27:32 PM »

Quote from: floppybootstomp on April 28, 2019, 09:16:06 PM

Very good looking and well built Sah icon_thumright

Damn, makes me want to build one (mustn't, enough is enough is enough... wink

)

Good to see the board going to good use.

Thanks Tony, real glad I did it, think I might make a headphone amp next. I like the look of the bottleneck
Cheers Phill


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Phill

SteveM

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Re: Tubelab 300b single ended tube amplifier build

« Reply #3 on: April 28, 2019, 11:32:02 PM »

Very nice Phil, glad to hear you're happy with it.
I'm almost finished my 1st tube/kit effort, a cheap Chinese unit.
300B someday maybe...


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vinyl>modded L78>Pickering XV-15 w/DTL-2S>Rabco SL8e>Lehmann Black Cube w/PWX>Simaudio I-5>Totem Sttaf
- otherwise NAD 4300 or Arcam FMJ DV139

AudioPhill

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Age: 56
Location: Essex uk
Posts: 237

Re: Tubelab 300b single ended tube amplifier build

« Reply #4 on: April 29, 2019, 06:58:18 AM »

Quote from: SteveM on April 28, 2019, 11:32:02 PM

Very nice Phil, glad to hear you're happy with it.
I'm almost finished my 1st tube/kit effort, a cheap Chinese unit.
300B someday maybe...

Thanks Steve, it's addictive, once I've finished one Im instantly looking for the next project.
Cheers Phill


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Phill

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