Battery Based Audiophile Beyond

[Guest]

13 hours ago, Upfront said:

Very cool things mate. What will you mate them with?

At this stage probably pair up with the ML CLS's but anything can happen

(Yea they are cool) sweet sounding things

 

Reason we are making them is because I have been searching the World for years to buy a pair, but they are scarce unobtaium.

[Guest]

Another Amp rolls off the Production Line

This one is tiny, looks the part though, metal flake charcoal grey and olive oil  for the red wood.

Now for the moment of truth, Blu Genie, nothing at all or a Winner !!!! always a worry first fire up. 

Particularly careful to note supply polarity on this.

 

@Aussieamps getting in a bit of practice before the big one Mate !!!!!!!  

Edited October 15, 2017 by Guest

[Guest]

@Upfront

You are right about the little amp Mate, what a ripper  

Combination actually sounds surprisingly nice.

Lst job was to drill a hole in the faceplate so as you can see the indication power on LED which is red .

Highly recommended D Class circuit, runs well on a 24v 50w switchmode supply and is stupidly efficient (loud) seems to like being dead cold, doesn't warm up  after running for over an hour, sounds sweet, does lots of things right, surprised. (edit after a couple of more hours the amp warmed up to luke warm)

Hisses a little in comparison with the Holtons, but could do better with a decent supply probably

Edited October 15, 2017 by Guest

[Guest]

Notes

watching the watt meter showing peaks of 10w, less than a light globe for excellent spl from the baffles, liking the 7" very much set up like this, simplicity is underrated . Very glad the 10dB L pad went onto those silk 18mm tweeters  which are actually quite listenable. .

 

 

 

[Guest]

New shirts for the International HiFi Show

Getting keen 2 weeks to go

[Rob181]

I thought you would have had a HPA T....

[Guest]

18 hours ago, Rob181 said:

I thought you would have had a HPA T....

Yep, you are right, have them also in a white collared polo  still in the mail tho

 

Look forward to catching up Rob. The Hotel is close to the venue for the show I think

 

 

Edited October 23, 2017 by Guest

[Rob181]

1 hour ago, 125dBmonster said:

Look forward to catching up Rob. The Hotel is close to the venue for the show I think

Yep...me too...

Said hotel is within 1 kl of the show venue (so travelmate tells me)...

An easy am stroll (to the venue) as long as the sun is shining...

I take no responsibility for the return distance to said hotel...

[Guest]

3 brand new shielded potted Toroidy Transformers can only mean 1 thing

 

More Holton Precision Audio Amplifiers to build  was very happy to see these turn up from Poland.

 

Note, these amps are for me, my hobby education and relaxation, not intended to be sold or be made available for show or sale

[Guest]

@Upfront

That lazy ribbon project is underway as well Mate, Ray's place Friday night to have a go and repair his, with replacement ribbons and a couple of beers.

We will probably have his magnetic stacks laying down on the bench for close inspection and some photos

[Upfront]

[mention=111049]Upfront[/mention]
That lazy ribbon project is underway as well Mate, Ray's place Friday night to have a go and repair his, with replacement ribbons and a couple of beers.
We will probably have his magnetic stacks laying down on the bench for close inspection and some photos

Would love to see inside mate if you do take some photos. Will be interesting to see what you and Ray come up with.

[Guest]

19 hours ago, Upfront said:

21 hours ago, 125dBmonster said:

[mention=111049]Upfront[/mention]
That lazy ribbon project is underway as well Mate, Ray's place Friday night to have a go and repair his, with replacement ribbons and a couple of beers.
We will probably have his magnetic stacks laying down on the bench for close inspection and some photos

Would love to see inside mate if you do take some photos. Will be interesting to see what you and Ray come up with.

Ray said he waited for years to even see a set, let alone for sale.

Basically we'll just copy them.

Will get some happy snaps no worries, we be making ribbons with aluminium foil and cellophane tape, which is apparently genuine original fitment. Ferrite magnets, aluminium extrusion for the support structure and for the pair I make a transformer at around 10:1 so as the 1 ohm across the ribbon, becomes 10 ohms seen by the amp, or something around that.

Ray's current ribbons run ok in parallel (with simple HP filter) with the electrostatics and no transformer to excellent effect

 

Interesting project, keen

Edited October 24, 2017 by Guest

[Upfront]

I've been lucky enough to hear Rays ribbons. Impressive. Would love to see your happy snaps. I'm more impressed with the aluminium foil and tape!

[Guest]

me too Mate, apparently a kitchen bench top will be involved as well to stick every thing on to, before peeling it off, dunno but intrigued, Ray's done a few sets in the past as repairs, needs 2 blokes that like speakers to build them right

 

[Guest]

Dam, case is too small, might have to cut a hole and let some of it poke out.

tiny watt amp project, 300va transformer

[Guest]

@aussieamps

All of this DIY stuff is being packed for the HiFi Show Mate 

 

EDIT except for the 4mm split SS wwashers and baffle

Edited October 25, 2017 by Guest

[Guest]

Great supply for the lab

[Guest]

exactly where it was asked for

[Guest]

Should be interesting an interesting project  

Just to see what operational bandwidth , and how they sound

Edited October 27, 2017 by Guest

[Upfront]

Should be interesting an interesting project [emoji4] 
Just to see what operational bandwidth , and how they sound

Are they large magnets all the way up each side Matt?

[Guest]

20 hours ago, Upfront said:

On 10/27/2017 at 7:57 AM, 125dBmonster said:

Should be interesting an interesting project  
Just to see what operational bandwidth , and how they sound

Are they large magnets all the way up each side Matt?

Hi Linc, yep 

First job done, which was probably the most daunting part of the whole process make a successful pair of ribbons.

Corrugating them comes next as the tools start coming in. Metalized Mylar will be experimented with as well, just waiting on materials

For this job will use strontium ferrite  magnets. plenty of study to do yet on the rest of the build. 

 

[Upfront]

Hi Linc, yep 
First job done, which was probably the most daunting part of the whole process make a successful pair of ribbons.
Corrugating them comes next as the tools start coming in. Metalized Mylar will be experimented with as well, just waiting on materials
For this job will use strontium ferrite  magnets. plenty of study to do yet on the rest of the build. 
 

Build thread!?!?!?

[Guest]

17 hours ago, Upfront said:

17 hours ago, 125dBmonster said:

Hi Linc, yep 
First job done, which was probably the most daunting part of the whole process make a successful pair of ribbons.
Corrugating them comes next as the tools start coming in. Metalized Mylar will be experimented with as well, just waiting on materials
For this job will use strontium ferrite  magnets. plenty of study to do yet on the rest of the build. 
 

Read more  

Build thread!?!?!?

It's here Mate 

Would doubt there would be much interest anywhere else

[Guest]

Length will be around 1600mm 

Measured impedance for the drive is 1.8 ohms and from suggestions it remains a purely resistive load when in action, shimmering

[Upfront]

Length will be around 1600mm 
Measured impedance for the drive is 1.8 ohms and from suggestions it remains a purely resistive load when in action, shimmering

Keep the photos coming mate. Will be interesting to see how yours sound compared to Rays