A2 experiments.

Ali Tait · Post by **Ali Tait** » Mon May 28, 2012 9:46 pm

Thanks poppet.

Mike H · Post by **Mike H** » Tue May 29, 2012 1:17 pm

Gerra room ....

Ali Tait · Post by **Ali Tait** » Tue May 29, 2012 7:11 pm

We had one at Owston Hall thanks.

Mike H · Post by **Mike H** » Wed May 30, 2012 10:36 am

So you did.

They were in separate buildings I should hasten to add.

pre65 · Post by **pre65** » Wed May 30, 2012 11:16 am

Mike H wrote:So you did.

They were in separate buildings I should hasten to add.

There was talk of a ghostly figure with long flowing locks creeping from the coach house to the main building at 2.30 in the morning.

Dave the bass · Post by **Dave the bass** » Wed May 30, 2012 11:31 am

pre65 wrote:
There was talk of a ghostly figure with long flowing locks creeping from the coach house to the main building at 2.30 in the morning.

....but...but....Ali's got short pointy hair!

DTB

Mike H · Post by **Mike H** » Wed May 30, 2012 4:55 pm

"Who is number one?"

It was Phil.

I was number six

pre65 · Post by **pre65** » Wed May 30, 2012 5:06 pm

Tis true, I was numero uno !

Dave the bass · Post by **Dave the bass** » Fri Jan 11, 2013 10:23 am

Remember this amp from the Owston before last?1. Wednesday I finally completed it by ramping the HT up to 600V and cranking the anode current up to 70mA (ooo, ya devil) and thus achieved my all time high of 42W max plate dissipation per channel. TZ40 just shrugged it off. It was good, its massively large and a pickle to set up but at least it worked and sounded good. Huzah.

As a project I learnt a bit from it about +ve grid bias and got that thoriated breathy sound I've heard in other amps.

Inspired, I think its time to move on to another project.

DTB

Mike H · Post by **Mike H** » Fri Jan 11, 2013 1:31 pm

The convoluted start-up procedure is not for your average other family member, I know that

Nothing so simple as throwing one switch

Seems just a bit less elaborate than running up Didcot power station and synchronising it to the national grid

Dave the bass · Post by **Dave the bass** » Fri Jan 11, 2013 1:57 pm

^^^

And henceforth, that TZ40 amp will be known as 'The Didcot'!

DTB

pre65 · Post by **pre65** » Fri Jan 11, 2013 2:26 pm

Dave the bass wrote:^^^

And henceforth, that TZ40 amp will be known as 'The Didcot'!

DTB

So young Dave, is TZ40 "Didcot" consigned to room 101 now ?

Dave the bass · Post by **Dave the bass** » Fri Jan 11, 2013 3:03 pm

Yup, time to move onto a new project. Different valves, same approach.

DTB

thomas · Post by **thomas** » Sat Jan 12, 2013 10:48 am

I remember it sounded excellent at that Oweston....

So what valve are you moving on to, or would that be telling?!

Dave the bass · Post by **Dave the bass** » Sat Jan 12, 2013 10:57 am

Thanks MrT, yeah I was pleased with 'The Didcot'.

Output-wise I'm think 830B, another off-the-radar-possible-no-hoper valve.

It forces me not to copy what others have done before that way. Plus they're pretty cheap and I have at least 4 if I kill one or two during experimentations.

http://scottbecker.net/tube/sheets/049/8/830B.pdf

Onwards, to the project room!

DTB

audio-talk

A2 experiments.

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