Roger, I don't know the PN, but Q4401 is a 2SD1878. That crosses to SK10088, 2SD2370, 2SD1555, 2SD2300 & NTE 2331. Sorry I have no info on Q4301. -Clint God Bless Us All Clint Hamilton, Owner http://OrpheusComputing.com sales@xxxxxxxxxxxxxxxxxxxx techassist@xxxxxxxxxxxxx 4orpheus@xxxxxxxxxxxxx (alternates) orpheuscomputing@xxxxxxxxx pchardware@xxxxxxxxxxxx (PLEASE include previous correspondence if replying to this email!!) ----- Original Message ----- From: <ElectronMan10@xxxxxxxxx> To: <Techassist@xxxxxxxxxxxxx> Sent: Wednesday, October 03, 2001 2:38 PM Subject: [TechAssist] RCA(Part number) Would like to know part no. horizontal output transistor(Q4401) and (Q4301). Thanks CTC-177BH2 Electronic Service 1225 Birmingham road, Sulligent, Alabama 35586 Phone: 205-698-8047 (Roger) Help make your TechAssist online repair tips database better! Submit your fixes here: http://www.circuitwork.com/techassist/tip/#tips To unsubscribe write to: techassist-request@xxxxxxxxxxxxx with unsubscribe in the subject line. Help make your TechAssist online repair tips database better! Submit your fixes here: http://www.circuitwork.com/techassist/tip/#tips To unsubscribe write to: techassist-request@xxxxxxxxxxxxx with unsubscribe in the subject line.