Vintage Collins Audio Bandpass Filter 400-3000 Hz, No. 6730202009
This vintage Collins audio bandpass filter (No. 6730202009) covers a 400–3000 Hz passband and is suited for audio testing, restoration projects, or vintage electronics setups. It has been functionally tested using an audio sweep generator and an oscilloscope to confirm operation. The unit shows small cosmetic marks consistent with age and use. Free shipping is included. Check the listing for details on included accessories, connectors, and any additional notes on performance or calibration.
| Location | Kerrville US |
| Shipping | Free shipping (check listing for details) |
| Seller |
cal-w
100.0% positive · 3966 feedback
|
| Listing | FixedPrice · Active |
| Start time | 2025-11-23T22:09:10.000Z |
| Brand | Collins |
| Compatible Brand | Universal |
| Type | Filter |
| Unit Type | Unit |
| MPN | 6730202009 |
| Country of Origin | United States |
This filter is 2.25" tall x 1.75" diameter (excluding connections on the bottom). I have tested it to confirm that it is indeed a 400 to 3000 Hz filter with a signal generator and oscilloscope. No further testing was done.Printed on the side is the following information:NO. 673 0202 00 9BAND PASS FILTERCLASS R GRADE ILIFE EXP. X.400-3000 CPS. PASS BANDINPUT IMPED.-470 K OHMSOUTPUT IMPED.-470 K OHMSO - DCINPUT LEVEL 0.5 V RMSMW 180 (? scratched in center)Terminals on the bottom are stamped IN, G, and OUT
