Very interesting amp - thank you for this advice and especially the schematic. only spoken/lecture, while PA means that the application has been optimized for music live events on stage (music open air or indoor concerts). In the German magazine Funkschau Number 8 from the year 1974 you will find a detailled circuit description from page 251 to 254 about this model.īTW the term ELA is the German abbreviation for "Public Address" (PA)Īnd stands for E lektro akustik (electro acoustic)īut in New High German colloquial usage this terms no longer the same Įla means that the application was improved for voice transmissions without music, i. I like such designs, because it is easy to get a symmetric signal behaviour.Ībout the Telefunken model (ELA power amp) "V665" with 250W output power no pics and information online at this time (auctions from ebay unfortunately always deleted after 3 months).
![2n3055 transistor ampeg 2n3055 transistor ampeg](https://i.ebayimg.com/images/g/QBsAAOSwFGZgiz~K/s-l400.jpg)
Here some URLs from this model and related other models probably with similar schematic:Ģ x DYNACORD DEM 286 Verstärker ENDSTUFE 200 WATT bei : PA-Verstärker Endstufen (endet 02.06.10 12:29:30 MESZ)īasicly great similarity with the topology ofĪfter certainly modifications (especially after remove the frequency low/high pass limitations) this could be a ultimate sounded home hifi power amp. The circuit description is to find in the German Magazine "Funkschau" number 3 from the year 1984.
![2n3055 transistor ampeg 2n3055 transistor ampeg](https://i.pinimg.com/originals/d4/01/bf/d401bfc2acd79bb542c71cf7eab55b2f.jpg)
2N3055 TRANSISTOR AMPEG PDF
The detailled circuit you will get from Dynacord as PDF file. Instead the six emitter resistors there are six primary windings of a big fat output transformer "DCN 330775".
![2n3055 transistor ampeg 2n3055 transistor ampeg](https://i.ytimg.com/vi/-UDR7_f6ovM/maxresdefault.jpg)
This one drive a push pull darlington pair that consists of one 2N6487 and three parallel switched 40636 from RCA for each half (40636 = 2N3055 with higher value for Vceo). The Dynacord amplifier without global NFB and driver transformer and output transformer works with 2x TDA2030 for driving a very fat driver transformer "DCN 309272".