The Secret Society of Lathe Trolls

No , hopefully I will not too late to raise the money for the Caruso , I'm in the way , and yes , the preamps and the Caruso are fresh ale , lot of stuff near retirement can become alive one more time ... and thats very very interesting for a lot of people , can give other perspective specially to t...

for example.

Yes yes , if i understand what you wanna try i guess really the most sharpened cutting needle , less weight for the same deep , if you need more weight maybe your problem is the sharpness ...

Aha , yes flo , Im tryng the amp of the K10 , i must understand really isnt important the amp polarity relative to the feedback polarity ?

Yes emidisc , simply no use the feedback loop , great boost great trebles end , i was probing with a presto 1C on the K10 and the preamp sounds great.

Hi , I'm tryng to get working together A Presto K10 and a Grampian Type D with the caruso preamp , spend one hour here searching about what of the cutter connectors on the K10 is the positive (+) one , some man (or lady) have the answer... ? its the one near to the plate or the one near to the cutte...

Yes , sorry i saw all in the schema later , now the board is complete , i attached the ps and try somethings , but no sound at the output , maybe is something related with the 2 resistors bug ? more tests these days.

I'm ready to test it. test the board without the opamps first. check with a multimeter if you have connection between pin1 &2,Pin2&3 and Pin1&3. if you have connection between those pis. something is bad. Thats mean between the opamps 1,2&3 pins ? or the J100 power pins ? And about the power , what ...

i wanna to put in a 1 x 19" rack , the LM317 based ps seems better option ( at least better than a shoes box size ps ) , i must assume simply short the ps output wires around the stylus shank ? and start to open the regulator pot ?

Thanks.

Hi to all , Retaking that issue ... is possible get an easy clear schema of what must wire that system (ps board + transformer + heat sink) , where the resistors are wired ? i must asume the really important is regulated voltage or regulated current ? the ps pot changes the voltage , but how to chan...

Thanks for that data , today i finalized the power supply , monday at work ask to the guys to see what that does under the oscilloscope and check for the N+R achieved , some suggestion about isolate the power supply possible noises ? , actually Transformer (2.4 VAC) -> rectifier -> 2200 uF -> 22 uF ...

Ohhhh , yes yes , the IC601 part , really i wasnt see that , ok ok , now totally clear , I think have all the parts to start with this.

Thanks Mark and Flo for the fast responses and take the time for that newbie dumb questions.

Best Regards

Aha , I understand most changes you are talking about here (thats a theorical way to fix the issue , not ?) , but when say "Remove R606 (sets SSM2019 gain to unity)" , i dont understand that part , SSM2019 is another operational than the used here , not ?

Thanks.

Aha , MarK considerations about adapting with the Grampian gonna taked in care for me , maybe a document about use the board with the Grampian can be do it , not ? For me its a very long term project but someone with better skills (and more instant results wanted ) can be useful. Seeinng the old "Ja...

Yes , I thinking something similar , are really good TT around the world (ClearAudio , VPI , Thorens , Rega , Lenco , etc etc etc ) to sacrilege a Lathe in that way , and the really important its have a moving magnet cartridge with a dedicated pre and etc etc etc , not ? Crazy Insane people around t...

Im not an expert on that instrument (im not an expert on anything recognize it is the first step ... hehe ) the dynamic and frequential range of that instrument is very very large , are you try to compress in many ways the audio source ? that can be a multipurpose device but you know the compressors...

Presto 6N cutting PVC for me not , is the only can say. But im think how smooth runs the mechanism is more important than directly the materials involved , im in the same situation , sorry.

yes , im in the same with a 6N overhead project , someone here talks about the Reloop RP 6000 , have adjustable torque until 4.5 Kg per cm2. the other way im thinking is buy an old transcription plate , and try to adapt a classic 1500(50hz) / 1800(60hz) bodine/qrk/russco motor over there , but someo...

you have flutter problems .... not ?

Wow response avalanche when sleep (really happy friends ,was very bad days for me , Im recovering from herniated disc on the back (how ironic not ?) , and all good things its aligned in the precise days , yesterday and today , thanks for your energy ). Really its very very simple. The chip its an Ar...

Aha , yes , really my question about accuracy isnt in that way , as Mark suggest isnt a pretentious project , must be simple and easy , and for fun , and taking in care the case , its and old Lathe , the original motor is dead , i replaced with a Bodine that works @ 60hz , and here in Spain the main...