I just fired up my 330A Harmon Kardon stereo receiver. It's been
sitting a while. It worked great at first but then all of the speakers
on both channels starting sounding fuzzy like they were blown (it
happened suddenly and I'm quite sure the speakers are fine). Is that a
fuse issue? I remember changing a fuse before. Is there a reason they
would blow frequently? If it's more complicated than a fuse I mean to
take this opportunity to educate myself about electronics repair. I'm
very mechanically handy but know nothing about circuits. What tools
should I purchase? Is there a book or a site to get me going in the
right direction? Thank you anyone for your time.

-David

First, determine whether it's the receiver or the source. Do you get
fuzzy sound on all sources - tape, CD, LP, and radio? Can you try
different speakers or try your speakers on a friend's receiver?

DavidC wrote:
I just fired up my 330A Harmon Kardon stereo receiver. It's been
sitting a while. It worked great at first but then all of the speakers
on both channels starting sounding fuzzy like they were blown (it
happened suddenly and I'm quite sure the speakers are fine). Is that a
fuse issue? I remember changing a fuse before. Is there a reason they
would blow frequently? If it's more complicated than a fuse I mean to
take this opportunity to educate myself about electronics repair. I'm
very mechanically handy but know nothing about circuits. What tools
should I purchase? Is there a book or a site to get me going in the
right direction? Thank you anyone for your time.

-David

DavidC wrote:

I just fired up my 330A Harmon Kardon stereo receiver. It's been
sitting a while. It worked great at first but then all of the speakers
on both channels starting sounding fuzzy like they were blown (it
happened suddenly and I'm quite sure the speakers are fine). Is that a
fuse issue? I remember changing a fuse before. Is there a reason they
would blow frequently? If it's more complicated than a fuse I mean to
take this opportunity to educate myself about electronics repair. I'm
very mechanically handy but know nothing about circuits. What tools
should I purchase? Is there a book or a site to get me going in the
right direction? Thank you anyone for your time.

-David


I have the schematic if you need it.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

Bennett Price wrote:
First, determine whether it's the receiver or the source. Do you get
fuzzy sound on all sources - tape, CD, LP, and radio? Can you try
different speakers or try your speakers on a friend's receiver?



Yes. I checked that out. I switched on the FM and AM and Phono with
no change in the fuzziness. The unit had only been on for about a half
hour. We turned it off for the nite. Then this morning we turned on
the FM again and it's fine and been fine all day. So, the issue is
intermittant. I also checked the 3 fuses on the back (Spkr. A / B /
and AC) and they're all fine.

Michael A. Terrell wrote:

I have the schematic if you need it.

Thank you. I would appreciate that. Is it a PDF or something? Also,
do you know where I could get a look at the manual? I saw a link to HK
manuals, but the link didn't work.

-David

Also wanted to point out that I'm running 3 speakers at once. Two
large Pioneers on one channel and then a single bookend Sony on the
other channel and I'm running both channels simultaneously. Is that
safe for the system?

DavidC wrote:

Michael A. Terrell wrote:

I have the schematic if you need it.

Thank you. I would appreciate that. Is it a PDF or something? Also,
do you know where I could get a look at the manual? I saw a link to HK
manuals, but the link didn't work.

-David


http://home.earthlink.net/~michaelat...30A%2520sm.pdf It
includes the manual and parts list. I bought one of these new in 1973.
;-)

The manual will be there till I need the web space again.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

DavidC wrote:
Also wanted to point out that I'm running 3 speakers at once. Two
large Pioneers on one channel and then a single bookend Sony on the
other channel and I'm running both channels simultaneously. Is that
safe for the system?

The problem is more likely dirty controls / switches. Try manipulating
them, turning the balance control, pushing the tape monitor buttons, etc
whilr music is playing. You might well find the offender. Not so good
running multiple speakers - but if you keep the volume levels lower, and the
speaker wires are OK it shouldn't really be a problem.

Mark Z.

I suggest you try each speaker, one at a time, and see if fuzziness is
present in all speakers. You're assuming the problem is in the HK.
Disconnect all but one, throw the balance switch all the way to the
connected side and see what happens.

DavidC wrote:
Bennett Price wrote:
First, determine whether it's the receiver or the source. Do you get
fuzzy sound on all sources - tape, CD, LP, and radio? Can you try
different speakers or try your speakers on a friend's receiver?



Yes. I checked that out. I switched on the FM and AM and Phono with
no change in the fuzziness. The unit had only been on for about a half
hour. We turned it off for the nite. Then this morning we turned on
the FM again and it's fine and been fine all day. So, the issue is
intermittant. I also checked the 3 fuses on the back (Spkr. A / B /
and AC) and they're all fine.

On 5 Sep 2006 01:05:57 -0700, "DavidC"
wrote:

I just fired up my 330A Harmon Kardon stereo receiver. It's been
sitting a while. It worked great at first but then all of the speakers
on both channels starting sounding fuzzy like they were blown (it
happened suddenly and I'm quite sure the speakers are fine). Is that a
fuse issue? I remember changing a fuse before. Is there a reason they
would blow frequently? If it's more complicated than a fuse I mean to
take this opportunity to educate myself about electronics repair. I'm
very mechanically handy but know nothing about circuits. What tools
should I purchase? Is there a book or a site to get me going in the
right direction? Thank you anyone for your time.

-David


The other responses are far more likely but the 330A was known for the
audio output transistors intermittently opening up which does sound
fuzzy. Chuck

Chuck wrote:

The other responses are far more likely but the 330A was known for the
audio output transistors intermittently opening up which does sound
fuzzy. Chuck


That sounds very interesting. It happened again once more after being
on all day and then when shut off for a while it was fine again. I
haven't tried the disconnecting of the speakers but I'm positive it's
in all three as I have speakers A and B and I switched back and forth
between them to no avail. The fuzziness was in all three to an equal
extent.

-David

DavidC wrote:

Chuck wrote:

The other responses are far more likely but the 330A was known for the
audio output transistors intermittently opening up which does sound
fuzzy. Chuck

That sounds very interesting. It happened again once more after being
on all day and then when shut off for a while it was fine again. I
haven't tried the disconnecting of the speakers but I'm positive it's
in all three as I have speakers A and B and I switched back and forth
between them to no avail. The fuzziness was in all three to an equal
extent.

-David


Have you downloaded the manual? I need to delete it from the website.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

On 7 Sep 2006 23:09:21 -0700, "DavidC"
wrote:


Chuck wrote:

The other responses are far more likely but the 330A was known for the
audio output transistors intermittently opening up which does sound
fuzzy. Chuck


That sounds very interesting. It happened again once more after being
on all day and then when shut off for a while it was fine again. I
haven't tried the disconnecting of the speakers but I'm positive it's
in all three as I have speakers A and B and I switched back and forth
between them to no avail. The fuzziness was in all three to an equal
extent.

-David
If you suspect the audio outputs, hitting them with freeze spray
when the fuzzy sound commences should heal them temporarily. Chuck

Have you downloaded the manual? I need to delete it from the website.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

Just did. Thanks very very much Michael. I really appreciate that.
By the way what's that microphone looking thing on the back which is
hardwired into the unit and can flip up to being a couple of inches out
from the back of the unit?
-David

Chuck wrote:
On 7 Sep 2006 23:09:21 -0700, "DavidC"
wrote:


Chuck wrote:

The other responses are far more likely but the 330A was known for the
audio output transistors intermittently opening up which does sound
fuzzy. Chuck


That sounds very interesting. It happened again once more after being
on all day and then when shut off for a while it was fine again. I
haven't tried the disconnecting of the speakers but I'm positive it's
in all three as I have speakers A and B and I switched back and forth
between them to no avail. The fuzziness was in all three to an equal
extent.

-David
If you suspect the audio outputs, hitting them with freeze spray
when the fuzzy sound commences should heal them temporarily. Chuck

Not sure how to do that.. Freeze spray? Is that like the stuff we
used to use for chewing gum removal?

-David

DavidC wrote:


Have you downloaded the manual? I need to delete it from the website.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

Just did. Thanks very very much Michael. I really appreciate that.
By the way what's that microphone looking thing on the back which is
hardwired into the unit and can flip up to being a couple of inches out
from the back of the unit?
-David


It sounds like the AM antenna.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida