Philips AG 9007

Can You maybe recommend some specific Transformer?

Maybe these are a good cheap alternative.
www.tme.eu/nl/details/tts200_z230_24v/to...en/breve-tufvassons/

I have ordered 4 Philips Miniwatt tubes, but they very difficult to obtain. Is there some oder tube that don't need readjusting bias?

Here I bought the Philips tubes NOS a 12 euros
www.electrontubes.nl/Voorraad/voorraadset.htm


A problem is to find a stereo preamplifier which is enough to support the AG9007's

I have seen those. It'll be very interesting to hear that combination.
But i barely got a permission to put ESS in the living room, hence the idea to connect it to my speakers. To be honest, this is my first tube Amplifier. I don't know what to expect with this combination. But when it's done i'll make a report.
ESS AMT 1 is anything else but simple to drive. It needs warm, musical and punchy Amplifier. Thay need strong defined bass and somewhat rolled off top end...

Bert Kn schreef :

Are those monoblocks any good?
Do thay sound any good?

What output transformers would you recommend?

I have good experiences with toroid core 230 / 24V transformers.

What tubes would you recommend?

Philips tubes are fine, I also use them on my ÁG9007’s.

I have read somewhere that i need 5v signal from Preamp. Is this true?

That's right.

Thank You for all the information. This helps me alot!

Can You maybe recommend some specific Transformer?
I have ordered 4 Philips Miniwatt tubes, but they very difficult to obtain. Is there some oder tube that don't need readjusting bias?

Thank one again!

Schnjoki schreef : It never occurred to me that this is Mono system?
I bought Philips as Monoblocks i thought that the Preamp is Stereo.
Thanks for the reply and information!

Yes it was. And a damned good one too! High-end in the fifties in mono and Philips never
reached that level in stereo (not even close with the costs).
Mono hifi Philips 1954
If you scroll downwards there is an article in English.
Maybe you did found out Philips also made a range 800 and 1200 ohm speakers for these
circlotron OTL amplifiers. That was rather unique in the world (and stayed unique).
Also with a range of radio's in that time.
To get the best performance you should search for OTL speakers if possible. Even in stereo.
If not possible you have to search for the best output transformers.

In the sixties Philips used the amps also (in stereo) for the phonogram listen-studio's but these
newly produced amps were a bit modified and with other (professional) connections.
The two you show are from the fifties and it is possible to connect two speaker systems
as shown here, so two large bass cabinets and four 'satellites' for the middel and high tones.
Professionally used in f.e. dance rooms. With it you get a 60 watt OTL system. All mono.
The satellites are connected under the bass cabinet on the cross over filter.
All in-build speakers were the famous Philips AD9710 in 400 and 800ohm.

This was one mono set of speakers (there was also an 800ohm speaker set):

In those days, in Holland, John Average earned about 150-200 guilders a month.







Succes and fun with the amps.

It never occurred to me that this is Mono system?
I bought Philips as Monoblocks i thought that the Preamp is Stereo.
Thanks for the reply and information!

Are those monoblocks any good?
Do thay sound any good?

Very good with great sound.

What is the value of Philips AG 9007?

Depending on the condition
between 150 and 300 euros I think.

Does it make any sense investing in those monoblocks?

yes they are worth it.

What output transformers would you recommend?

I have good experiences with toroid core 230 / 24V transformers.

What tubes would you recommend?

Philips tubes are fine, I also use them on my ÁG9007’s.

How can i adjust the bias?

They have a fixed bias.

Is there anything i should be aware of?

In general, not except for the non-polar capacitor in the output.

I have read somewhere that i need 5v signal from Preamp. Is this true?

That's right.