Firebottle Power Amplfier

[Ali Tait]

Look forward to hearing it sonetime Alan.

[Arkless Electronics]

It was nice to speak to you last night Alan. Thanks for ringing. I like your technique for auxiliary windings on the toroid!

[Firebottle]

Now that I have the final circuit I have costed the design. In order to achieve good SPPV I have opted for a 'plain Jane' enclosure with an input level control.

This can always be set to maximum for straight power amplifier mode.



I shall be producing one in the next few weeks to send out for trials. Initial purchase price £550.

[Macca]

I am interested in this, Alan.

[Zoidburg]

If there is a trial version that can be "borrowed" for a week or 2 ala your phono stage I would be very interested in having a demo please Alan.

[Firebottle]

Hi Ben,
I'm in the process of building the first 'proper' version then Macca is going to have the first trial.

I'm reluctant to make one as a loaner that will be passed on by post as the weight is already up to 5.7kg and it's not finished yet

[Firebottle]

I have decided that the name Axolotl is too long so have rechristened the amp the Firebottle AIR.
It has been pointed out that is now sounds like it might be something from the Apple stable but as I have nothing of that ilk I am unconcerned.

The first example is complete and will be taken along to a bake off this Saturday.







Internals for those that have desire:




This build has an input level control in order to be matched to a variety of source equipment but I think I will replace it with just a mute switch.
This is a zero feedback design so I was a little unsure of the final gain but it has worked out well.

Sensitivity is 0.75 volts (rms) for 100W into 8 ohms.

[Jimbo]

Looks very well built Alan - must be very expensive

[CageyH]

Add me to the list of people looking forwards to hearing this.

[CageyH]

Having heard this amp yesterday, all I can say is those going to NEBO are in for a treat.
I think you are going to be a busy man.