Some time ago R.G. Keen came across this beauty; it elucidates a few of the house naming schemes employed by Electro-Harmonix and can really help if you're trying to trace an older (1970s) pedal made by them.
| EH Model # | Manufacturer's # | Description |
|---|---|---|
| TR 0010 | 78Ll5 | voltage regulator |
| TR 0020 | BC309 or 2N5087 | transistor |
| TR 0030 | BC239 or 2N5088 | transistor |
| TR 0040 | 2N3055 | transistor |
| TR 0050 | 2N5235 | transistor |
| TR 0120 | 2N4908 | transistor, pup, TO-3 |
| TR 0130 | 2N6110 | power transistor |
| TR 0150 | 7815 | voltage regulator, 3-term, 15v |
| TR 0160 | 2N4302 | FET VP 1.3-1.8v |
| TR 0170 | 2N4302 | FET VP 1.81-2.2v |
| TR 0180 | 2N4302 | FET VP 2.21-3.0v |
| TR 0190 | 2N4302 | FET VP 1.3-3.0v |
| PO 030 | U260 | 10k trim pot |
| PO 150 | XM2184 | 100k linear pot |
| PO 160 | CR2852 | 100k CW log pot |
| PO 170 | CA9064 | 100k CCW log pot |
| PO 210 | BM5714 | 2M CCW log pot |
| PO 220 | XR3163 | 100k linear pot |
| PO 230 | 8677A | 100k linear slide pot |
| PO 240 | 98787 | 7k-11k dual pot |
| PO 270 | CM42059 | 100k linear pot |
| PO 300 | S605917 | 1M dual pot |
| PO 325 | DB5648 | 100k linear pot |
| XE 0010 | 34VDC45MACT1559 | transformer (European) |
| XE 0020 | 42VDC1.1A596P11 | transformer (European) |
| LO 1073 | 1073 | overload bulb |
| SM 0180 | driver nut | |
| SM 0190 | driver tube connector | |
| HO 620 | SJ5025 | square rubber feet |
| KN 0010 | 1400R | black knob w/ set screw |
| KN 0020 | 1470A | black knob |
| KN 0030 | 9135 | lustre cap (white) |
| IC 0020 | LM324N | DIP 14 pin IC |
| IC 0030 | LM339 | DIP 14 pin IC |
| IC 0040 | NE570 | DIP 16 pin IC |
| IC 0050 | LM741DN | DIP 8 pin IC |
| IC 0060 | 741HC | can 8 pin IC |
| IC 0070 | EH922 | 14 pin IC |
| IC 0080 | SAD1024A | Reticon DIP IC |
| IC 0090 | EH1048 | DIP 8 pin IC (purportedly a CA3094) |
| IC 0100 | MC1458N | DIP 8 pin IC |
| IC 0110 | CA3080 | can 8 pin IC |
| IC 0120 | CA3098E | DIP 8 pin IC |
| IC 0130 | 530JH | can 10 pin IC |
| IC 0140 | CD4009UBE | DIP 16 pin IC |
| IC 0150 | SCL4013BE | DIP 14 pin IC |