Completely Restored Eico HF81 Integrated tube amplifier
are rated at 14 watts per channel and feature a built in phono stage.
The amp has
been restored with the following work completed:
bare chassis restoration..chassis cleaned and rca jacks labelled at back.
New Belton tube sockets and shields in phono/preamp section,
and in power/ pre-driver section . Original
sockets for rectifier tubes.
rewired with stranded 22 guage wire.
power supply capacitors, 2 40uf/450v , can cap was replaced with a JJ 100uf
dual at 500v, plus an additional 68 uf /250v under the chassis.
All the small caps were replaced with silver
mica, bypass caps were polypropylene.
caps in the preamp section and power amp section are all PIO K40 Russian and
all other small electrolytic caps also
in the power supply rail are metal oxide
, plate resistors are Kiwame 2 watt carbon film and all others are carbon film.
original speaker terminals and all rca jacks were replaced with binding posts
for the speakers and gold rca jacks for the inputs.
terminals have the 4 ohm and 8 ohm taps connected to the binding posts.
The 4 ohm
tap is next to the black terminal.
original rca jacks were terrible in these amps, making bad contacts and having
intermittent grounds. The new rca jacks are tight and have a solid ground. This
comes with a new Heyboer extra heavy duty power transformer, which has more
metal core and the heaters can handle a few extra amps than their regular
with a new power cord.
selector was replaced with a new 6x2
switch, and thus all the RIAA phono equalization components have been installed
under the chassis. This improves the phono section drastically in this amp with
There are 3
line inputs now, 1 phono and 1 line out.
mono/stereo blend switch has been bypassed along with the mono switch on the
chassis. The on/off switch on the treble shaft has been moved to the old tape
switch on the front and a new switch installed.
pot has been replaced with an ALPS 250k and shaft extender to utilize the
Tubes: 2 EZ81/6CA4
Mullard Rectifier Tube-no lettering
visible ,dates codes very faint
Phono Stage: 2 Rogers Made in Canada(Amprex, mullard)?codes visble
Predriver- 2 Heatkit labelled Mullard 12AX7
Preamp- 2 12AU7 Baldwin labelled –Made in Japan
Power Tubes-2 Rogers Logo (Amprex, Mullard )?
2 Phillips USA EL84/6BQ5 –Matched
have been tested and checked for leakage and shorts.
Serious inquiries, I can provide test results of all the tubes
All the output
transformers are original.
The chassis front, and sides and top grill
have been repainted..looks great!!
was cleaned and looks very nice. It has all the original knobs.
This one is
dead quiet, with no hum, all the controls were cleaned and are quiet.
is not perfect on this unit, it had some rust spots which have been cleaned and
polished. Also there was a hole on the right side panel which someone had
installed a switch to replace the broken one on the end of the treble control,
and thus a plastic plug was installed. Other than these 2 flaws it is in very
nice shape for the age.
lowered the price a bit on this unit to reflect the 2 flaws mentioned.
additional info and pix if required.
USA purchase email for shipping costs and prefer paypal. 4% fees to be added.
Canada EMT is preferred, or paypal.