[TechAssist] Re: Sherwood -S2660 CP Stereo Amp. Help?. Blown (both) speaker
- From: "Hoyt's TV" <hoytstv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 13 Mar 2006 08:50:55 -0500
What a waste of a Saturday night.
Saturday night is for sitting around the old Grunow, hooked up to your long
wire antenna, trying to tune in WSM before the Grand Old Opry starts. With
several bottles of home brew in the ice box to share with your buddies. If
you can't get WSM then WOWO will do.
Russ Hoyt
Hoyt's TV
Exeter, NH
----- Original Message -----
From: "Tel-Tek Electronics" <teltek3@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, March 13, 2006 8:20 AM
Subject: [TechAssist] Re: Sherwood -S2660 CP Stereo Amp. Help?. Blown (both)
speaker
> Yeah....we have a couple of those up this way too.
>
> Can hear them coming from 2 blocks away. Seem to use the whole car as
> one big Woofer. On a Saturday night, you can actually see the headlights
> dim with each Bass note.
>
> -Ed-
> Tel-Tek Electronics
> Ontario-Canada
>
> TechAssist Member 2003.
>
> PS:
> If replying to this email, please include all threads.
>
>
> teltek3@xxxxxxxxxxxx
>
> Al Gutz wrote:
>> Ed
>> Yes they have improved, now they use 1500 to 3000 watt amplifiers.
>>
>> Al G
>>
>> Tel-Tek Electronics wrote:
>>> Hey Peter..Can I "Capacitance Couple" my Test speakers?
>>> Seem to blow one or both each year, and I do very little Audio.
>>>
>>> I found Audio a pain in the rear...due to what the customer would hook
>>> up, after he got the unit home.
>>>
>>> Used to do allot of Pioneer Car Audio in the 80's...The kids would bring
>>> these back every couple of months, expecting warranty...hooked up with
>>> common grounds...150W to 300W...mismatched speakers...tin foil in fuse
>>> links...I just could not keep up....
>>>
>>> Tell me...are kids getting any better? ;-)
>>>
>>> -Ed-
>>> Tel-Tek Electronics
>>> Ontario-Canada
>>>
>>> TechAssist Member 2003.
>>>
>>> PS:
>>> If replying to this email, please include all threads.
>>>
>>>
>>> teltek3@xxxxxxxxxxxx
>>>
>>> Peter oliver wrote:
>>>
>>>> I agree change the IC, the hum is most likely DC voltage going to the
>>>> speakers, Our test bench speakers are capacitor coupled to prevent DC
>>>> shorts
>>> >from blowing them, with a hum and blown fuses you must check the
>>> >customers
>>>> speakers and wireing as they are the most likely cause and/ or are
>>>> damaged
>>> >from the short in the amps output, since you may fix the amp to have it
>>>> blown by the customers damaged speakers/wires. We have seen speaker and
>>>> or
>>>> wire problems enough that We will not warranty any amp work if the
>>>> speakers
>>>> and wires are not checked. (make sure they didn't use car speakers,
>>>> non-powered sub woofers, ... etc-- any low impedace/high draw item) The
>>>> only
>>>> other cause for a hum might be bad grounds, filter caps or a predriver
>>>> but
>>>> output IC is most likely.
>>>>
>>>> Peter Oliver
>>>> Tucson Radio TV
>>>>
>>>> From: Tel-Tek Electronics <teltek3@xxxxxxxxxxxx>
>>>> Reply-To: techassist@xxxxxxxxxxxxx
>>>> To: techassist@xxxxxxxxxxxxx
>>>> Subject: [TechAssist] Re: Sherwood -S2660 CP Stereo Amp. Help?. Blown
>>>> (both)
>>>> speaker fuses. Replaced, now loud hum?
>>>> Date: Sat, 11 Mar 2006 15:55:21 -0500
>>>>
>>>> Definitely change the STK2250, only about $10 from www.pacificsemi.com
>>>>
>>>> Not to presume that this will fix your problem, but a good start.
>>>>
>>>> You need a minimum order of $25 to order from them, so you may do
>>>> better
>>>> trying to get it locally.
>>>>
>>>> -Ed-
>>>>
>>>>
>>>> Tel-Tek Electronics
>>>> Ontario-Canada
>>>>
>>>> TechAssist Member 2003.
>>>>
>>>> PS:
>>>> If replying to this email, please include all threads.
>>>>
>>>>
>>>> teltek3@xxxxxxxxxxxx
>>>>
>>>> Robinson Electronics wrote:
>>>>> Can any of you stereo Techs. help me with this receiver?
>>>>> Never worked on Sherwood amps.
>>>>> Both of the speaker fuses were blown, replaced fuses "5A", now has a
>>>>> loud
>>>>> hum noise when powered on, even with volume all the way down.
>>>>> This one uses 1 IC (STK2250), don't have a datasheet on it, and cannot
>>>> tell
>>>>> if it is causing the problem - still checking.
>>>>> Pins 4,5, & 6 are reading a "short" together, and
>>>>> 10,11,12, &13 are also reading a "short" together?
>>>>> Can anyone help me with this, very much appreciated.
>>>>> Thanks. David.
>>>>>
>>>>> Robinson Electronics
>>>>> 1075 Sweeten Creek Road #51
>>>>> Asheville, NC 28803-1757
>>>>> Ph./Fax. 828 274-3787
>>>>> Toll Free. 1-888 ROBELECT
>>>>> www.robinsonelectronics.com
>>>>> www.robelect.com
>>>>> Mailto: RobinsonElectronics@xxxxxxxxxxx
>>>>>
>>>>>
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