Name: | High Frequency Laboratories (HFL); Chicago, IL (USA) |
Brand: | Isotone || Mastertone || Regent |
Abbreviation: | high-frequ |
Products: | Model types |
Summary: |
High Frequency Laboratories Trade names: Isotone, Mastertone, Regent, HFL |
History: |
Country | Year | Name | 1st Tube | Notes |
---|---|---|---|---|
USA | 31 | Mastertone 1931 | 27 | |
USA | 32 | 222 | 35 | |
USA | 31 | Little Giant 400 | 235 | Similar model is the RPC Little Giant HFL-4. |
USA | 35 | 4Tube Pentode | ||
USA | 31 | 5 | 35 | |
USA | 31 | 505 | 24 | |
USA | 31 | 520 | 24 | |
USA | 31 | Mastertone 5-269 | ||
USA | 31 | Mastertone 7 | 24 | |
USA | 31 | Mastertone 7-292 | ||
USA | 31 | 840 | 24 | |
USA | 31 | 841 | 24 |
Further details for this manufacturer by the members (rmfiorg):
Data Compliance | More Information |