|
|
|||||||
| Home | Forums | Rules | Articles | Store | Gallery | Blogs | Register | Donations | FAQ | Calendar | Search | Today's Posts | Mark Forums Read | Search |
| Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum |
| diyAudio Sponsor | ||
|
|
||
|
|
Thread Tools | Search this Thread |
|
|
#1 |
|
diyAudio Member
Join Date: Oct 2010
|
I posted this problem two weeks ago regarding my Fisher 101D keep blowing fuse but without picture. Now I manage get some pictures. Some very helpful members try to help me but for dummy music lover like me have no clue where the caps are or what its look like, and here the pics. More pics to come
|
|
|
|
|
#2 |
|
diyAudio Member
Join Date: Feb 2004
Location: South Wales
|
One of the two diodes by the orange cap doesnt look to have a lead one end!
Maybe just the pic, but prolly worth checking it and its compliment, the 600V cap and the electrolytic too. Hopefully one of those will be faulty and the mains Tx is OK....
__________________
Das Beste Oder Nichts |
|
|
|
|
#3 |
|
diyAudio Member
Join Date: Aug 2006
Location: Taxland, New Jersey
|
The diodes that need checking are the two I have circled in the picture below. Use your ohmmeter to look for a low reading in both directions which would indicate a shorted device. Good diodes will have a low reading in only one direction. The unseen lead is simply bent underneath and only appears missing.
One other thing I do see that needs to be checked is the output tube that's second from the end. The top looks very light in color and may be gassy and in poor condition.
__________________
"The supercomputer is technologically impossible. It would take all of the water that flows over Niagara Falls to cool the heat generated by the number of vacuum tubes required." ~ Professor of Electrical Engineering, New York University |
|
|
|
|
#4 |
|
diyAudio Member
Join Date: Oct 2010
|
Thanks for help I will try.I post more pics.
One picture has red clip with blue wire, the wire is not sold together,do I have to sold back together ? Another pic with screw driver point to blue wire , look like the last service people cut that wire, again , do I have to connect it ? I have to clean this amp, a lots of cat's hair inside. Talking about clean , as you can see, how to clean this amp to look shine. |
|
|
|
|
#5 |
|
diyAudio Member
Join Date: Aug 2011
Location: Utah
|
Looks like somebody already subbed in some caps to repair a previous incidence of bad ones. See if you can find a buddy into electronics or worse case bite the bullet and take it into a shop. Not really feasable to trouble shoot a modified unit.
Doc
__________________
Ne timeas a facie mulierum ea ignorare |
|
|
|
|
#6 | |
|
diyAudio Member
Join Date: Oct 2010
|
Quote:
|
|
|
|
|
|
#7 |
|
diyAudio Member
Join Date: Oct 2010
|
|
|
|
|
|
#8 | |
|
diyAudio Member
Join Date: Oct 2010
|
Quote:
for check diodes, do I have to disconnect both end ? |
|
|
|
|
|
#9 |
|
diyAudio Member
Join Date: Aug 2006
Location: Taxland, New Jersey
|
No, that's not necessary because a shorted diode will be very obvious and the circuit will not affect the reading. Should be high in one directioin and low in the other. Very low in both directions means a bad diode.
__________________
"The supercomputer is technologically impossible. It would take all of the water that flows over Niagara Falls to cool the heat generated by the number of vacuum tubes required." ~ Professor of Electrical Engineering, New York University |
|
|
| Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
| Thread Tools | Search this Thread |
|
|
|
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| Fisher 101D | eeplok | Tubes / Valves | 4 | 31st August 2011 03:25 AM |
| New 'lytics blow the fuse | glorocks | Parts | 13 | 4th June 2009 02:54 AM |
| Sa-5.1 blow fuse | jpweaner2 | Tubes / Valves | 0 | 3rd May 2007 01:36 PM |
| Two power supplies blow fuse | h_andree | Chip Amps | 14 | 4th September 2004 02:09 AM |
| Tube amp fuse blow out | Gabevee | Tubes / Valves | 1 | 4th March 2002 03:55 PM |
| New To Site? | Need Help? |
| Page generated in 0.12268 seconds (78.68% PHP - 21.32% MySQL) with 11 queries |