h&e Studiotechnik

Dennerlein HAMMOND B3 inside

Be honest. How often did you lay your eyes on a stripped Dennerlein Hammond B3? The organ, of course, not organ "playgirl" Barbara Dennerlein? Well, enjoy the panorama view of a stripped Hammond B3 on the photo above. Recently we got an emergency call from a soundcheck : the Hammond B3 suddenly sounds terrible ... the concert starts in two hours ... help!		The philosophy of Hammond: one wire, one function. And there are a lot of of them, as you can see. Within 30 minutes right next to the soundcheck of the drums and the bass we identified the problem. The 100 kg instrument got an additional electronic audio bypass and the organ player was able to join the band in time. Some days later in our workshop we repaired it for good. We used 32 years of experience in analog technology, a German Oszilloscop Hameg HM 302, the original Hammond B3 service manual and a biological system working on the basis of DNA.


Neutrik meets Fairchild 670 This is a view on a Faichild 670 Limiter Ser. Nr. 070 built in 1959. Even the high-tech Neutrik Analyser A1 in the front of the picture couldn't reveal the secrets of the legendary machine behind. The 670 was in bad shape. One of the transformers was completly burned out. Carefully we unwinded and counted every single winding of its coils. With love and the cleaned original iron parts we manually reconstructed the transformer. It literally took us months. The result: No measureable and audible difference in comparison to the other channel. The sound of this "full-valve-compressor" of the 52s can be heard on nearly every famous original vinyl record of the 50s, 60s, and 70s.


		Tab U73 Compressor/ Limiter Fortunately, there are people on this earth who can't resist the strange urge to put something in a cellar and leave it there untouched for 30 years ore more. A man with such urges told us terrible stories about the sins of the 60s. He has seen how tons of U73s were thrown away and melted to death. Some U73s could be rescued by his hands. The U73 Tab Compressor is incredible heavy and it seems as if it consists of nothing more than many, many huge transformers. This device had broken wires on the input transformer. We cleaned every contact, checked every resistor, measured every condensor, ... and so on. Finally, we added some new original "VALVO" tubes. Switching it on for the first time and listening to our favorite music after many hours of restoration brought some happy smiles on our faces.

Neumann U67 There are not many people in this world who have the pleasure to open a NEUMANN U67. Fortunately, we had it several times. This old U67, originally used by the BEATLES, still smells a little bit exotic. Of course, we touched it only with white gloves and left the surfaces uncleaned. In several years from now there may be a breakthrough in criminalistic diagnosis. And then we will know ... what they have smoked really. Mankind in the future might also discover that there was a tiny usefull service and repair made around 15.05.2000. They also might notice that fortunately the original patina and sound was not influenced at that time. We would like to treat your U67 the same way.

		Theory and Reality In the back you can see the theory of a Tab U73 (schematic diagram). In the front you see the reality: a lot of transformers, carefully shielded by MU-metall covers, valves, condensors, huge over-dimensioned resistors, tiny control labels from the manufactor Tab, and control stamps from 13.Dez.1963. If we do service we leave all things as original as possible. Broken transfomers, for instance, will be completely reconstructed with the original wire dimension and their orignal iron parts. Even the isolation between the windings will be made by paper from the 60s, condensors replaced with functional ones from old valve radios of the 60s. We are sure that after reconstruction it will sound exactly like 37 years ago.