Simulcast / Duocast - LT1054CP or LT1044SCPA - which is better?
- Thread starter lcipher3
- Start date
reubenreub
Active member
I'm not 100% sure but I think both are designed with the LT1054 in mind. Generally if you use a 1044S or 7660S you'll need to connect pins 1 and 8 in order to not get an audible whine in the circuit. In the Simulcast, those pins are not connected. You might be able to get by with creating that connection yourself as it's not on the PCB and using the 1044S, depending on how much current is needed.
Nostradoomus
Well-known member
I used a 1044, I don’t quite recall if the PCB had the little connection on the underside or if I just used a clipped lead to attach it. It was easy either way and I saved 5 bucks not buying a 1054.
Robert
Reverse Engineer
The Simulcast and DuoCast both have solder jumpers on the back of the PCB to connect pins 1 and 8 if you want to use a 1044S or 7660S Just bridge the connection with a little blob of solder.
Fuzzonaut
Well-known member
Can I piggyback on this and ask, if and how it would be possible to replace the TY-141P (Frequency Response: + 2dB from 200 to 15,000 Hz) with a TY250P (Frequency Response: + 1db from 20 to 20,000 Hz), although the TY250P has 8 pins?
@lcipher3 would this one work as a substitute transformer?
I don't know s--t about transformers, but it looks like the impedance and turns ratio is the same. The listed frequency range listed is lower however, but would that make a difference? The 141p is hard to get unless you want to pay $$$
I don't know s--t about transformers, but it looks like the impedance and turns ratio is the same. The listed frequency range listed is lower however, but would that make a difference? The 141p is hard to get unless you want to pay $$$
Nostradoomus
Well-known member
Digi-Key has TY-141P, they’re only a buck or two more than those.
Just as an FYI, Mark Davis on the DIYSB FB group told me that this one will do the job: https://www.mouser.com/ProductDetai...xc5f_S12X7_h8Yqv9StL6WWZDhkcNgen9H-qcbpyzZrjM
I don't know much about what the transformer is actually supposed to be doing in the circuit, so I'm not sure yet and will need to try it out and see.
I don't know much about what the transformer is actually supposed to be doing in the circuit, so I'm not sure yet and will need to try it out and see.
caiofilipini
Well-known member
Yes I think I got this one on a recommendation from another internet group: 42TL218-RC
Haven't tried it because I still need to get the germanium transistor. God this circuit is a pain for sourcing parts!
Haven't tried it because I still need to get the germanium transistor. God this circuit is a pain for sourcing parts!
caiofilipini
Well-known member
Indeed! Thanks for the link.
