10 years of the Tubong Bastos

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Re: 10 years of the Tubong Bastos

Postby geriboy » Sat Oct 12, 2013 11:57 am

Do you have any pictures of the "tubong bastos"? :)
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Re: 10 years of the Tubong Bastos

Postby Jon Agner » Sun Oct 13, 2013 8:14 pm

Image

The TB 2A3 SET Amp and the Tono 12AU7 preamp :) both celebrating their 10th year :)
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Re: 10 years of the Tubong Bastos

Postby geriboy » Wed Oct 16, 2013 6:44 pm

Thank you sir Jon for posting the pics.
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Re: 10 years of the Tubong Bastos

Postby johnmarc0 » Sun Dec 27, 2015 11:53 pm

Anyone still selling his TB2A3? I would like to have it back hehehehe
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Re: 10 years of the Tubong Bastos

Postby johnmarc0 » Mon Dec 28, 2015 12:01 am

Jon Agner wrote:Johnmarco, toobs, Mickey, and ArnoldC :)

Me, I would like to hear this again with Ike's voigts :).

Yes, it's been 10 years since the Tonomen designed this php 10k SET amp :). And along the way, there have been modifications introduced to this kit amp by those who were brave enough to build this amp. The design topology makes the amp flexible for modding :)



Designing the TB2A3 was royal rumble, you always have to argue with Mickey on the chassis cost/design issues, Ed on simplicity of fabrication and neatness, VD on keeping the cost low/ balancing the demand vs scarcity, Arnold on the parts selection and design points, Me on keeping it Loftin White design, save cost on the interstage cap while making it clinical and recalculating the B+ vs direct coupling bias voltages. We were headless chickens getting the first unit working as being assembled by Arnold.

One of the best times of my adult life, I pay homage to my fellow tonomen! :emo: :emo: :emo: :emo:
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Re: 10 years of the Tubong Bastos

Postby JackD201 » Mon Dec 28, 2015 5:27 pm

12 years later and its time for Tubong Bastos-er :devil: :devil: :devil: :devil:
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Re: 10 years of the Tubong Bastos

Postby dimfer » Mon Dec 28, 2015 8:30 pm

Or Tubong Masbastos :devil: :devil:
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Re: 10 years of the Tubong Bastos

Postby hypertriode » Tue Dec 29, 2015 8:17 am

I still have an un-built kit, johnmarc0. Chassis and iron. ;-)

johnmarc0 wrote:Anyone still selling his TB2A3? I would like to have it back hehehehe
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Re: 10 years of the Tubong Bastos

Postby johnmarc0 » Tue Dec 29, 2015 4:44 pm

hypertriode wrote:I still have an un-built kit, johnmarc0. Chassis and iron. ;-)

johnmarc0 wrote:Anyone still selling his TB2A3? I would like to have it back hehehehe


How much you are throwing it for? can you send a photo?

Regards
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Re: 10 years of the Tubong Bastos

Postby johnmarc0 » Tue Dec 29, 2015 5:16 pm

JackD201 wrote:12 years later and its time for Tubong Bastos-er :devil: :devil: :devil: :devil:


dimfer wrote:Or Tubong Masbastos :devil: :devil:



In the initial design of TB series, my original proposal was a 6SN7-300B loftin white self biased with a center tapped filament transformer avoiding the use of a hum pot. I was told to redesign kasi sabi nilang lahat we wont make it to the cost objective!!!! :sweat: :sweat: :sweat:


Last august i came across ebay while buying spare boards for the office, I came by a 5V center tapped 300B-2A3 power transformer. So told myself this reminds me of a tubong bastos design. So i bought them along with a potted 4.2K opt.

After reading this thread i redrawn my original proposal with parts at hand. So here it is

Image
Image
Image

I might just build this hehehehe, let us see!
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Re: 10 years of the Tubong Bastos

Postby Jon Agner » Sat Jan 02, 2016 2:35 pm

12 years and it's still the 2A3 Tubong Bastos and 12au7 Tono preamp combo :) Great to see johnmarcO alive and kicking :D
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Re: 10 years of the Tubong Bastos

Postby johnmarc0 » Tue Jan 05, 2016 12:33 am

here are the tubes that i would use, arnold is rooting for me not busting my ass and build this hehehehehe :D :D :D

driver tubes
Image

test 300B tubes
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reference tubes - WE 300B
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rectifier tubes
Image

cokebottle rectifier tubes
Image
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Re: 10 years of the Tubong Bastos

Postby Jon Agner » Tue Jan 05, 2016 1:43 pm

November HiFi Show is 11 months away :)
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Re: 10 years of the Tubong Bastos

Postby johnmarc0 » Tue Jan 05, 2016 4:23 pm

Jon Agner wrote:November HiFi Show is 11 months away :)


It's a darn cheap tune-up/kutingting amp!!!! :D :D :D :D :D after its done and made i will let everyone audition it for 3 days just like in the past.

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