Hi what makes you think that Bate Vanko? this unit was built in the UK in the 90's and there normally have fitted ST 2N3055s from the factory, I have never seen this brand before with the Beta (B) and am thinking they may be recently fitted fakes as the power output seems a lot lower than the 2 previous amps I had of this model.
Need a spec sheet on them. What else would cause lower than expected power output? I checked all line voltages, Bias etc and they are all good.
Need a spec sheet on them. What else would cause lower than expected power output? I checked all line voltages, Bias etc and they are all good.
BATE VANKO is correct...
https://en.wikipedia.org/wiki/Electronics_industry_in_the_Socialist_Republic_of_Romania
https://en.wikipedia.org/wiki/Electronics_industry_in_the_Socialist_Republic_of_Romania
Thank you both very much. I located the transistor catalogue for IPRS Baneasa, available as PDF download, I'll leave link on here for anyone else who needs to check data specs on any of their parts.
https://www.electrokits.ro/en/iprs-baneasa-silicon-transistor-catalog/
Seems the 2n3055 they supplied for this amp only have an fT of 0,8 Mhz (terrible) so may look to change them for newer MJ15003's or possibly MJ21194g. As I mentioned earlier the last 2 amplifiers like this used ST transistors both seemed to perform way better than this one I have now.
https://www.electrokits.ro/en/iprs-baneasa-silicon-transistor-catalog/
Seems the 2n3055 they supplied for this amp only have an fT of 0,8 Mhz (terrible) so may look to change them for newer MJ15003's or possibly MJ21194g. As I mentioned earlier the last 2 amplifiers like this used ST transistors both seemed to perform way better than this one I have now.
Alongside:
"Original oder Fälschung" = original or false
http://www.corvintaurus.de/original_faelschung_hauptseite.php
"Original oder Fälschung" = original or false
http://www.corvintaurus.de/original_faelschung_hauptseite.php
