Transformers & Enclosures
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> "Classic" Transformers & Enclosures
tube audio amplifier (example)
Using all Hammond transformers, chokes,
chassis, ventilated cover, bottom plate and rubber feet.
"CLASSIC" line of
For all you
lovers of the world!
- Send in your
ideas of where you used our products - we will be glad to post them here - Application
- Eleven (11) new
high current - dual primary - stock transformers added to our line - perfect
for high power - tube filaments (February 2014)
- We are
now quoting & building transformers to Peter
W. Dahl's original designs. (April 2013)
W. Dahl transformers to live on! A purchase agreement has been signed and executed
with Hammond Manufacturing Company, Inc. of Cheektowaga, New York to acquire the
Peter Dahl line of products from Harbach Electronics, LLC. Finalization of the
acquisition and transfer of assets will take place over the next few weeks with
the transfer to be completed by March 31, 2013. (February 2013)
VAC / 50 Hz. versions ("EX") of our most popular Fender
replacement power transformers added (Listed January 2013)
high power (almost 1KVA) 379WX power transformer
added (December 2011)
sided chassis added to line (aluminum & steel) (Listed May, 2010)
NEW higher power plate/filament transformers
added to line (Listed January 2010)
- UPGRADED tube
guitar amplifier output transformers added to line (Listed October 2009)
tube guitar amplifier power transformers
added to line (Listed October 2009)
- Our NEW Transformer
& Inductors catalog (5C-08) is now available
(Listed July 2008)
- A NEW series of replacement - tube
Guitar Amp. transformers (Listed July, 2007)
- Single - Ended tube output transformers - Two NEW impedances
added & all models improved performance - "1627-1642"
series - added (Listed Aug., 2005).
- 7 sizes
of universal primary, economical, open frame, plate & filament transformers
- "260" series - added (Listed Aug., 2005).
- 22 NEW sizes added to our "300"
series of universal power transformers (Listed July, 2005).
ended "universal" output transformer series our popular 125SE
series has two NEW additions (20 & 25 watt),
optimized for single
ended tube output circuits (Listed March., 2004).
- Constant Voltage Isolation Transformers,
worried about voltage regulation? Repair it at the source and regulate/clean/isolate
your supply (line) voltage! (Listed March, 2002).
Isolation & Autotransformers, safely run equipment almost anywhere
in the world! Great for the bench & check out our slight step down units to
keep the stress off those older 110VAC receivers (Listed March, 2002).
- RCA Radiola III-A replacement
audio transformer (Listed March, 2002).
- Single ended
"universal" output transformer series (3 - 15 watts). Our popular 125
series has a NEW addition, optimized for
single ended tube output circuits
- the 125 SE series (Listed Nov., 2001).
- 5 watt tube driver transformers, 124
series - we have already added 3 parts since their introduction in 2000
(Listed Late 2000)!
- High power, high impedance, single
ended output transformer added to our line - our 75 watt, P/N 1642SE
"300" series power transformer specs...
Our "300" series universal primary - Plate/Filament power transformers.
Operates anywhere in the world! (Listed
- Part Number
119DA our response to requests from the "Collins Collectors Association"
(an audio matching, 600 ohm to 4/8 ohm, transformer) (Listed 2000).
-- OLD NEWS
Why do we love "Classic" products?
It's in our roots - check out our company history.
- In the early 1980's we
also produced Hammond R.F. linear amplifiers for Amateur (Ham) Radio use. Naturally
tube type, built for continuous duty, powered by Hammond "iron" &
housed in Hammond enclosures. We stopped production over 30 years ago. Even now
folks are still asking about them (many are still in active use today). Two versions
of two different models were produced:
HL-2000 (later became the HL-2000A) using two
HL-1000 (later became the HL-1000A) using a
single 3-500Z tube - designed to be a lighter & more economical version of
the more powerful HL-2000A.
along with this series of R.F. amplifiers in the 1980's, were R.F. accessories:
power antenna tuners - the AT-1500
watt low pass R.F. filters HF-1000LP
the 1960's we sporadically offered the HL-500
(87K photo), HL-700 and HL-750 linear amplifiers
too. They used quad 811-A output tubes. Not only using Hammond "iron",
RF chokes and enclosures BUT also using our then available, air
variable condensers (PDF - 239K). Very little data on these amplifier
models has survived...
for specs. on one of our older transformers?
known catalog G-48 (PDF
5.1 MB) from 1935
to Bruce MacMillan & SPARC
for finding & scanning this)
in a travel back in time, to perhaps the peak of the radio era?
1950's Catalog #65, we even gave transformers their own names!!!
Section (25 pages)
the late 1930's we designed audio amplifiers using our transformers & enclosures.
Thanks to Bill Crowther (of Winfield, B.C.) for locating these schematics &
sending them to us. Interesting to see a note on the 1247 & 1245 diagrams
regarding 25 or 60 cycle power use!
also made audio amplifiers & battery eliminators (again combining our enclosure
& transformer skills) in the 1920's! Check out a few pages from the fascinating
Aikenhead's Radio Catalog
(1929-1930) (PDF file 934K) - an early Toronto, Ontario distributor of
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