Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

Thread Closed
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Horseshoe magnet pickup
#1

I see your posting of an article about refurbishing a horseshoe magnet pickup.  I wish I had that 35 years ago when I acquired an Atwater Kent model 75 radio/phonograph.  A radio technician I knew got the chassis working and the radio still sounds great.  The pickup was in terrible shape and all I knew was to try and replicate what I saw.  I found a coil and mashed it slightly in a vise to fit the cavity, replaced the rubber damper and it worked!  I knew nothing about rubber or coil specs.  A couple years ago it was sounding sick (I rarely play it except for fun experiments).  The rubber damper seemed fine, and I used heat sink tubing for the cradle sleeves.  I had always been concerned about the heavy weight of the magnet, and it seemed weak.  I didn't know about using a "keeper" when I removed it for the other repairs.  Then I thought of trying powerful button magnets.  The result was almost ear shattering volume! More experiments and I now use just one little button magnet on each side (the polarity must be right or you won't hear anything, plus the pickup is a lot lighter.  I've tried minute adjustments to the magnet screws and right now the volume and frequency response seem good but there is a little distortion on the loud passages.  I was astounded by how loud it got when the cradle was more loose.  Any suggestions on the distortion?  Really not bad, just noticeable.


Messages In This Thread
Horseshoe magnet pickup - by rvt32016 - 03-28-2021, 02:13 PM
RE: Horseshoe magnet pickup - by Chas - 05-26-2021, 04:38 PM
RE: Horseshoe magnet pickup - by Arran - 05-30-2021, 11:03 PM
RE: Horseshoe magnet pickup - by rvt32016 - 07-06-2021, 03:38 PM
RE: Horseshoe magnet pickup - by Arran - 07-09-2021, 08:29 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 42-345 Restoration/Repair
RodB :beerchug:Vlad95 — 10:22 AM
Philco 42-345 Restoration/Repair
Vlad, you nailed it. Swiss and German roots.RodB — 09:54 AM
5U4 vs 5Z4 tubes
Well this is a Hallicrafters SX/9 circa 1936. No real issues so far although I dodged a real bullet with a cap that was...bridkarl — 07:59 AM
5U4 vs 5Z4 tubes
The pinout is the same but the 5U4 has a 3 amp filament, verses 2 amps or less on the 5Z4. I think that the pinout of a ...Arran — 12:04 AM
Philco 42-345 Restoration/Repair
By the way. osanders0311 Take a look here: Dial cord stringing Guides May be here you can fount correct string settin...Vlad95 — 11:15 PM
5U4 vs 5Z4 tubes
5U4 and 5Z4 almost identical. I think nothing happened if you left 5U4 instedad 5Z4 long time. Just heater current 5U4 ...Vlad95 — 11:02 PM
Philco 42-345 Restoration/Repair
Hello Vlad95 , Very Funny ! Sincerely Richardradiorich — 11:01 PM
Philco 42-345 Restoration/Repair
RodB You are European yourself   :evil: I'm Canadian for the last 30 years  :snowman: But not Yankee  :lol: Vlad95 — 10:49 PM
Philco 42-345 Restoration/Repair
The band switch selects different oscillator coils for the band selected. I would look for a bad connection in the switc...RodB — 10:31 PM
Philco 42-345 Restoration/Repair
Hang in there...PaulPaul Philco322 — 09:30 PM

[-]
Who's Online
There are currently 881 online users. [Complete List]
» 1 Member(s) | 880 Guest(s)
Avatar

>