Bogen ST-10 Tube Amplifier
Archived listing from the original vintage-amplifier.com. Prices, seller details and purchase links have been removed; this page is a reference record, and nothing here is for sale. About this archive.
Bogen ST-10 Tube Amplifier. The amp is extremely versatile. It allows for output from the preamp section, the cathode follower and the full amplification stages. It uses 6AQ5 output tubes in push-pull configuration. The amp sounds very good.
About this model
The ST-10 drew praise in its listing for flexibility: the signal could be taken from the preamp section, from a cathode follower, or from the full power stage. A cathode follower is a tube stage with very low output impedance, used to drive long cables or other equipment without loss of treble. The output stage uses 6AQ5 tubes in push-pull.
The 6AQ5 is the miniature seven-pin cousin of the 6V6, so expect around ten watts rather than tens of watts. The seller included a schematic showing the different configurations; anyone restoring one should look for the same document.
| Maker | David Bogen Company, USA |
|---|---|
| Type | Amplifier with preamp and cathode-follower outputs |
| Output tubes | 6AQ5, push-pull (listing) |
| Outputs | Preamp, cathode follower, full amplifier (listing) |
Questions collectors ask
What is a cathode follower output?
A tube stage taken from the cathode rather than the plate. It has no voltage gain but a low output impedance, so it can drive cables and other equipment cleanly.
What tubes does the Bogen ST-10 use?
The archived listing names 6AQ5 output tubes in push-pull.
Sources: Wikipedia: Push–pull output.
