Heathkit Transformer Cross-Reference
Heath P/N				Model Used In					Description
46-1				IG-42					Audio Choke
46-1				SG-8					Audio Choke
46-4				TX-1					Audio Choke
46-8				IG-42					Filter Choke
46-10				TX-1					Filter Choke
46-11				RX-1					Filter Choke
46-12				WM-5					Filater Choke
46-27				TT-1					Filter Choke
51-3				HX-10					Audio Output
51-19				WM-5					Output Transformer
51-23				TX-1					Audio Driver Transformer
51-31				T-4					Audio Output
51-34				TX-1					Modulation Transformer
51-35				RX-1					Audio Output
51-37				HX-30					Interstage Transformer
51-38				HX-30					Modulation Transformer
51-43				HW-19					Output/Modulation Trans
51-52				TT-1					Oscillator
51-55				HW-12					Audio Output
51-55				HW-12A					Audio Output
51-55				HW-16					Audio Output
51-55				HW-18					Audio Output
51-55				HW-22					Audio Output
51-55				HW-22A					Audio Output
51-56				HD-192					Matching Transformer
51-57				HD-192					Hybrid Transformer
51-80				IT-11					Bridge Transformer
51-95				HW-17					Audio Driver
51-104				GR-180					Audio Output Transformer
51-104				GR-295					Audio Output Transformer
51-111				HW-17					Modulation Transformer
51-120				GD-18					Audio Output Transformer
51-123				SB-100					Audio Output Transformer
51-123				SB-101					Audio Output Transformer
51-132				GR-180					Top-Bottom Pincusion
51-132				GR-295					Top-Bottom Pincusion
51-135				GR-180					Vertical Output
51-135				GR295					Vertical Output
51-136				GR-295					Side Pincushion
51-140				SB-301					Audio Transformer
51-149				GR-295					Power Transformer
51-155				GR-681					Pincushion
51-156				GR-681					Pincushion
51-157				GR-681					Audio Output
51-158				GR-681					Vertical Output
51-189				GR-295					Power Transformer
51-195				IM-4180					Audio Output
51-1541				GR-681					Horizontal Driver
52-70				SB-401					Modulator Transformer
54-2				IM-28					Power Transformer
54-2				SG-8					Power Transformer
54-2				AV-3					Power Transformer
54-2				VC-2					Power Transformer
54-4				A-8					Power Transformer
54-5				AA-1					Power Transformer
54-5				IM-12					Power Transformer
54-5				IM-58					Power Transformer
54-6				AO-1					Power Transformer
54-7				C-3					Power Transformer
54-13				A-9C					Power Transformer
54-21				AT-1					Power Transformer
54-22				IG-42					Power Transformer
54-23				V-7A					Power Transformer
54-23				IM-18					Power Transformer
54-26				O-12					Power Transformer
54-30				TX-1					Plate Transformer
54-32				WM-5					Power Transformer
54-34				IT-11					Power Transformer
54-36				AR-3					Power Transformer
54-37				TX-1					Filament Transformer
54-38				DX-35					Power Transformer
54-59				IG-82					Power Transformer
54-59				IG-62					Power Transformer
54-64				T-4					Power Transformer
54-65				TX-1					Power Transformer
54-66				RX-1					Power Transformer
54-70				PT-1					Power Transformer
54-71				SP-2					Power Transformer
54-72				TC-3					Power Transformer
54-73				VHF-1					Power Transformer
54-85				KS-1					Filament Transformer
54-86				KS-1					Plate Transformer
54-87				HW-19					Power Transformer
54-92				EF-1					Power Transformer
54-92				SB-630					Power Transformer
54-92				IG-102					Power Transformer
54-94				TT-1					Power Transformer
54-96				SW-717					Power Transformer
54-98				MP-10					Power Transformer
54-103				IO-12					Power Transformer
54-105				IO-10					Power Transformer
54-109				HA-20					Power Transformer
54-110				HA-10					Plate Transformer
54-111				HA-10					Filament Transformer
54-112				HA-10					Filament & Bias Transformer
54-113				HX-10					Filament Transformer
54-114				HX-10					Power Transformer
54-115				GR-110					Power Transformer
54-117				IG-118					Power Transformer
54-130				HO-10 / HO-13					Power Transformer
54-135				HX-30					Power Transformer
54-143				HP-23					Power Transformer
54-143				SB-401					Power Transformer (Single Pri)
54-144				HP-13					Inverter Transformer
54-149				GR-180					Power Transformer
54-151				SB-200 / SB-201					Power Transformer
54-168				SB-610					Power Transformer
54-177				IM-25					Power Transformer
54-179				SB-400 / SB-401					Power Transformer
54-179				HW-16					Power Transformer
54-181				AR-15					Power Transformer
54-182				SB-620					Power Transformer
54-182				SB-610					Power Transformer
54-184				IP-17					Filament Transformer
54-185				IP-17					Plate Transformer
54-186				AR-17					Power Transformer
54-191				IG-57					Power Transformer
54-197				HW-17					Power Transformer
54-198				SB-401					Power Transformer (Dual Pri)
54-198				HP-23					Power Transformer
54-199				AJ-15					Power Transformer
54-205				IG-18					Power Transformer
54-233				IG-28					Power Transformer
54-237				SB-220					Power Transformer
54-238				SB-220 / SB-221					Power Transformer
54-242				SB-303					Power Transformer
54-243				GR-681					Power Transformer
54-275				GR-681					Filament Transformer
54-283				IM-102					Power Transformer
54-285				IO-103					Power Transformer
54-286				IB-1102					Power Transformer
54-298				SB-650					Power Transformer
54-807				HP-23					Power Transformer
54-807				PS-23					Power Transformer
54-830				HW-2021					Power Transformer
54-830				HW-2031					Power Transformer
54-835				GR-2000					Power Transformer
54-836				GR-2050					Power Transformer
54-837				AD-1013					Power Transformer
54-840				IB-1103					Power Transformer
54-859				GC-1092					Power Transformer
54-878				HD-1410					Power Transformer
54-915				SA-1480					Power Transformer
54-940				H-77					Power Transformer
54-948				AA-1600					Power Transformer
54-950				IT-5230					Power Transformer
54-954				AP-1800					Power Transformer
54-958				AD-1701					Power Transformer
54-959				ID-4001					Power Transformer
54-962				H-14					Power Transformer
54-982				IM-2420					Power Transformer
54-1013				GC-1000					Power Transformer
54-1016				IG-1277					Power Transformer
54-1021				SW-7800					Power Transformer
54-1032				IO-4210					Power Transformer
54-1059				ID-5001					Power Transformer
54-1063				SB-1000					Power Transformer (Export)
This cross-reference has been supported by many users having checked the part numbers in their manuals. I have not
personally checked all of the items and errors may exist.
There may be more than one transformer part number for any particular model due to engineering changes or
multiple vendors that had qualified for the Heathkit part number.
In general the higher part numbers are newer.