After building a couple of Pass style amps over in this forum I have noticed that most amps don't use PCB spade connectors, which are de rigeur over in the Solid State amp forum. What's the deal with that? I like spade connectors, they make assembly and dis-assembly a snap. Especially when you like to use one case and one PSU and swap out amp boards as the mood permits. Soldered on pigtail connections to amp boards are a pain and can eventually break due strain. Although the Babelfish J board probably could have accepted spade terminals - the holes were too too big so the solder would not have held it well.
My guess is that, Mr Pass' amps don't use spade connectors (because his are commercial amps meant to be assembled just one time). So everyone follows. DIY amps are different - meant to be tinkered and swapped in and out. It would be nice if folks who design amp layouts over in this forum started providing holes and pads for spade connectors. Also, for audio input - I like to use either screw terminal blocks or holes for 0.10in pitch JST connectors.
My guess is that, Mr Pass' amps don't use spade connectors (because his are commercial amps meant to be assembled just one time). So everyone follows. DIY amps are different - meant to be tinkered and swapped in and out. It would be nice if folks who design amp layouts over in this forum started providing holes and pads for spade connectors. Also, for audio input - I like to use either screw terminal blocks or holes for 0.10in pitch JST connectors.
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well , that are your preferences .....
me , having zillion years of experience in service ...... I despise all (unnecessary) connectors
Wouldn't servicing an amp be made so much easier if wires could be removed from a board via a connector? I don't think any mainstream amp has soldered on wires.
had seen too many malfunctions due to poor contacts
wouldn't believe anyone , 'till I didn't found it by my self - poor connection acting as diode
that one was one of most puzzling ones ....
shortly - quick connections - more possible reasons for servicing
funny , isn't it ?
edit: try asking same question in Bleuturd thread ........ you'll run away , screaming for help
wouldn't believe anyone , 'till I didn't found it by my self - poor connection acting as diode
that one was one of most puzzling ones ....
shortly - quick connections - more possible reasons for servicing
funny , isn't it ?
edit: try asking same question in Bleuturd thread ........ you'll run away , screaming for help
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I'm thinking about full JFET Babelfish based on UJN1208K depletion mode output devices. What do you think about it ? Can I disconnect actual bias circuit and bias output transistors from outside negative PS ? Where R27 need to be connected after removing red marked parts ?
Zen, I have scope with FFT, laboratory +/- PS, so I can limit the current during regulation in new bias circuit and adjust properly gate resistor. Ok, new thread here: http://www.diyaudio.com/forums/pass-labs/313949-babelfish-jfet-ujn1208k.html#post5223628
sorry for tonight ..... lost my self in The Pass Pub: The High-End Off Topic Thread
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