Here is a plain text copy of a web site I saw describing these regulators. Switching Regulators (thick-film hybrid ICs) STK730-010 Self excitation type switchingregulator (adoption of MOSFET) Semi-regulated control, 110Wmaximum output power STK730-020 Self excitation type switchingregulator (adoption of MOSFET) Semi-regulated control, 145Wmaximum output power STK730-030 Self excitation type switchingregulator (adoption of MOSFET) Semi-regulated control, 180Wmaximum output power STK730-040 Self excitation type switchingregulator (adoption of MOSFET) Semi-regulated control, 210Wmaximum output power STK730-060 Self excitation type switchingregulator (adoption of MOSFET) Semi-regulated control, world-wide use., 110W maximum output power STK730-080 Self excitation type switchingregulator (adoption of MOSFET) Semi-regulated control, world-wide use., 210W maximum output power STK730-090 Self excitation type switchingregulator (adoption of MOSFET) Semi-regulated control, world-wide use., 280W maximum output power STK730-130 Self excitation type switchingregulator (adoption of MOSFET) Semi-regulated control, 105W maximum output power STK730-150 Self excitation type switchingregulator (adoption of MOSFET) Semi-regulated control, 170W maximum output power STK73903 Self excitation type switchingregulator (adoption of MOSFET) Feedback control, 180 W maximum output power STK73904 Self excitation type switchingregulator (adoption of MOSFET) Feedback control, 210 W maximum output power STK73906 Self excitation type switchingregulator (adoption of MOSFET) Feedback control, world-wide use., 110W maximum output power STK73907 Self excitation type switchingregulator (adoption of MOSFET) Feedback control, world-wide use., 180W maximum output power STK73908 Self excitation type switchingregulator (adoption of MOSFET) Feedback control, world-wide use., 210W maximum output power STK73909 Self excitation type switchingregulator (adoption of MOSFET) Feedback control, world-wide use., 280W maximum output power STK740-020A¡ä Externally excitation type switchingregulator (adoption of MOSFET) DC-DC converter that supports battery input (12V), allows arbitrary output voltages to be set, 25W maximum output power Peter Oliver Tucson Radio TV From: "LeRoy Westlund" <llw@xxxxxxxxxx> Reply-To: techassist@xxxxxxxxxxxxx To: <techassist@xxxxxxxxxxxxx> Subject: [TechAssist] Re: CTC177BF Date: Wed, 16 Oct 2002 09:47:58 -0600 Ed, Here is the info I have saved. I would only use the higher numbered regulator, when the original one is not available. LLW ************** STK730-010 110Watt can use -130 STK730-020 145Watt STK730-030 180Watt STK730-040 210Watt STK730-050 280Watt The 730-0XX of higher wattage will replace any lower but of course will cost more. There is also a STK730-150 that I believe replaces the -030 LeRoy Westlund Westlund TV & Electronics " It's such a pretty world 93 North Main today !.... Centerfield, UT 84622-0087 Look at the Sunshine. " Ph./Fax 435-528-3822 :-) mailto:LLW@xxxxxxxxxx -----Original Message----- From: Edward Gaidies <teltek2@xxxxxxxxxxxx> To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx> Date: Wednesday, October 16, 2002 9:20 AM Subject: [TechAssist] Re: CTC177BF > >Thanks Robert; >By this are you saying that we can stock one Regulator to sub for all three? > >-Ed- >Tel-Tek Electronics >Midland, Ontario >Canada. >teltek2@xxxxxxxxxxxx >----- Original Message ----- >From: "tvservice" <tvservice@xxxxxxxxxxxxxxxxxxx> >To: <techassist@xxxxxxxxxxxxx> >Sent: Wednesday, October 16, 2002 10:56 AM >Subject: [TechAssist] Re: CTC177BF > > >> >> Ed, >> RCA Partsfinder says use 215530 was originally stk730-010 now is >stk730-130. >> I believe stk730-150 will work OK >> Use #222518 for insulator >> Robert >> tvservice@xxxxxxxxxxxxxxxxxxx >> H & H Electronics Inc >> >> ----- Original Message ----- >> From: "Edward Gaidies" <teltek2@xxxxxxxxxxxx> >> To: "TechAssist" <techassist@xxxxxxxxxxxxx> >> Sent: Wednesday, October 16, 2002 9:10 AM >> Subject: [TechAssist] CTC177BF >> >> >> > >> > Can someone tell me what Regulator this set uses...Has an STK730-150 in >> > it...but from memory I was sure it called for a STK730-010. This set >came >> to >> > me from another shop. >> > >> > Thank. >> > >> > -Ed- >> > Tel-Tek Electronics >> > Midland, Ontario >> > Canada. >> > teltek2@xxxxxxxxxxxx >> > >> > ------------------------------------------ >> > To REMOVE your email address, click here: >> > http://www.tech-assist.org/unsubb.html >> > To CHANGE your email address, click here: >> > http://www.techassist.net/forms/change.html >> > ------------------------------------------ >> > ***NEW*** Tips Added Instantly!!!*** >> > Submit Repair Tips here: >> > http://www.tech-assist.org/secure/tip/ >> > >> >> ------------------------------------------ >> To REMOVE your email address, click here: >> http://www.tech-assist.org/unsubb.html >> To CHANGE your email address, click here: >> http://www.techassist.net/forms/change.html >> ------------------------------------------ >> ***NEW*** Tips Added Instantly!!!*** >> Submit Repair Tips here: >> http://www.tech-assist.org/secure/tip/ >> > >------------------------------------------ >To REMOVE your email address, click here: > http://www.tech-assist.org/unsubb.html >To CHANGE your email address, click here: > http://www.techassist.net/forms/change.html >------------------------------------------ >***NEW*** Tips Added Instantly!!!*** >Submit Repair Tips here: >http://www.tech-assist.org/secure/tip/ > ------------------------------------------ To REMOVE your email address, click here: http://www.tech-assist.org/unsubb.html To CHANGE your email address, click here: http://www.techassist.net/forms/change.html ------------------------------------------ ***NEW*** Tips Added Instantly!!!*** Submit Repair Tips here: http://www.tech-assist.org/secure/tip/ _________________________________________________________________ Unlimited Internet access -- and 2 months free! Try MSN. http://resourcecenter.msn.com/access/plans/2monthsfree.asp ------------------------------------------ To REMOVE your email address, click here: http://www.tech-assist.org/unsubb.html To CHANGE your email address, click here: http://www.techassist.net/forms/change.html ------------------------------------------ ***NEW*** Tips Added Instantly!!!*** Submit Repair Tips here: http://www.tech-assist.org/secure/tip/