scully 280 repro mod

[safe as milk]

hi
does anyone know where & what to jumper to get the signal through the pb/repro card
rather than just listening to the rec/input?
i searched google as well as here & read some posts about a 'joel' mod?
could that be one of the stateside joels that post here i wonder?

cheers

 

[Bill Wilson]

Are you qwanting to be able to listen to a recorded track in order to sync to while you record another part on another track of the tape? I have the 280 manual in the garage. Let me know if this is what you are trying to do & I will work out the mod.

Bill Wilson

 

[safe as milk]

hi
thankyou for the very kind offer bill

yes i would like the option to use the signal through the playback electronics as well as the
record card for even more colour hopefully.

im using them without a tape machine as mic pres btw.

hopefully it's just a couple of jumpers on the edge connector....fingers crossed!

actually if you have a 'clear' picture of the edge connector part of the schematic?
as my copy is pretty unreadable that would be enough to get me going bill

cheers

 

[abbey road d enfer]

For that, you need no modification, just put it in record mode use the off-tape output, but that introduces a delay, so you need to monitor the input signal. This was possible in Studer machines, which had two separate outputs.
Today, if you want to do that in conjunction with a DAW, you need to provide adequate switching and delay compensation.
Look for the CLASP system. Although it is beyond me why people would want to add noise, flutter and distortion to a perfectly viable signal chain...

 

[safe as milk]

hi
thanks for the reply
i was kinda thinking if i jumpered it id get the signal through that nice big playback vol
control on the end of the scully plus more sonic 'artifacts' from the repro electronics.
i dont think i will get a delay as there are no heads involved & no tape either...
i'll do a search for the CLASP

cheers

 

[abbey road d enfer]

i dont think i will get a delay as there are no heads involved & no tape either...

If you want to go through the PB electronics, you have to do it via tape and heads, unless you build a dummy head simulator, which involves several inductors, caps and resistors.

 

[safe as milk]

hi
abbey i hope your over complicating it!
im going to try to jumper on the large connector

does anyone have a clear schematic for the pin numbers pretty please?

cheers

 

[leadbreath]

U wanna basically send a line signal thru the playback pcb? I did think about it aswell but that circuit is built to interface with the tape head so without modding it so i don't think its doable  I hope I'm wrong though cos the 280 sounds nice

 

[gridcurrent]

where & what to jumper to get the signal through the pb/repro card
cheers

1.  bypass C606 with a 220 uF capacitor to defeat the playback equalisation.
2.  inject signal into pin 2 of the blue ribbon connector.
3.  the voltage gain of the preamp (minus line amp) will be approximately 13.3 dB.
4.  there are number of revisions; above suggestions per issue G, May 1965.

 

[safe as milk]

hi
thankyou for all the replies
i'll check the revision on the 280's then do as you suggest gridcurrent 8)

thanks again

 

[leadbreath]

Man I love this place...  let us know how it sounds safe as milk.

 

[bernatvm]

Well, did it ever worked?