File:Fender Pro Reverb (c.1980) - Original bias balance circuit (2014-02-06 11.16.48 by Ian Abbott).jpg
Original file (2,200 × 1,481 pixels, file size: 773 KB, MIME type: image/jpeg)
Captions
Captions
Summary
[edit]_-_Original_bias_balance_circuit_(2014-02-06_11.16.48_by_Ian_Abbott).jpg&action=edit§ion=1){kind=link}
| Description |
Unlike earlier Fender amplifiers which featured a bias adjustment potentiometer, this Pro Reverb and its related models were built with a "bias balance" pot. Older bias adjustment circuits allowed adjustment of the absolute value of the bias voltage, thereby adjusting the plate current in the output tubes. The "bias balance" circuit only allowed balancing the bias voltage supplied to the two 6L6GC output tubes. It was not possible to increase or decrease the value of the bias voltage. Today it is easy to obtain matched pairs of output tubes, for which a traditional bias adjustment is more useful. As-found, the bias voltage allowed for a plate current that was too high for good tone or long tube life. tremolo 6V6GT valve amp tube amp vacuum tube amp tube guitar amp vacuum tube guitar amp amp amplifier guitar amp guitar amplifier Teisco Del Rey Teisco Teisco amp Teisco guitar amp Teisco guitar amplifier. |
| Date | |
| Source | Original "bias balance" circuit |
| Author | Ian Abbott from Santa Clara, California, USA |
Licensing
[edit]_-_Original_bias_balance_circuit_(2014-02-06_11.16.48_by_Ian_Abbott).jpg&action=edit§ion=2){kind=link}
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
|
This image was originally posted to Flickr by Ian E. Abbott at https://www.flickr.com/photos/103579181@N02/13490671385. It was reviewed on 19 May 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-sa-2.0. |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 04:07, 19 May 2015 | | 2,200 × 1,481 (773 KB) | Clusternote (talk | contribs) | Transferred from Flickr via Flickr2Commons |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
_-_Original_bias_balance_circuit_(2014-02-06_11.16.48_by_Ian_Abbott).jpg&oldid=751278783){kind=link}