Repair or replace RTA12s

I have a pair of RTA12 that I've had since around 1979. Thought tweeter had blown. They're the top hat drivers, so I switched them, changed fuse, still only mids and bass, no tweetage. Replaced tweeter with new one from ebay. No tweetage. Question is whether to repair, by DHS Speaker Service, which I favor or buy a pair of Polk Audio LSiM 707. Equipment is Hafler 220 and 100 pre-amp, Rega Planar II w/ Orotofon blue and Yamaha CD-C600BL 5-Disc CD? Please share you views. I'm in Hawaii so cannot demo the LSiM 707s here.

Comments

  • FestYboyFestYboy Posts: 2,447
    Verify the poly switch is open before condemning the tweet.
  • pitdogg2pitdogg2 Posts: 10,011
    FestYboy wrote: »
    Verify the poly switch is open before condemning the tweet.

    Silly boy he states he changed the fuse therefore there is no polyswitch >:) :p

    I'd also clean the fuse holder very well and verify that the wiring to the fuse block had not corroded so much that it can't pass a signal. It's been known to happen
  • codycatalistcodycatalist Posts: 1,391
    Repair is my vote.
    Living room

    Mains: Paradigm 90P
    Lows: Velodyne CHT12, Pioneer SW-8Mk2
    Power: Marantz SR7000
    Tv: Samsung UHD 55' Curved 4k

    2 Channel Den

    Mains: SDA2B Upgraded XOs and Binding Posts
    Pre: Denon PRA-1200
    Power: Yamaha AV34
    TT: Pioneer PL510
    Tv: Samsung UHD 55' 4K

    Noggin Rockin'

    Phillips L2
    Grado SE80
    Harman Kardon CL
    Little dot 1+/GE JAN 5654w

    Closet of Dreams:

    Harman Kardon AVR130
    Yamaha HTR5590
    Polk RTA11TL
    Polk TSI200s
    New Large Advents 25th Anniversary Edition
    Bravo V2/RCA Clear top Conn branded 12AU7

    "Temptation is the manifestation of desire which equals necessity." - Mikey081057
    " I have always had a champange taste with a beer budget" - Rick88
    "Just because the thread is getting views don't mean much .. I like a good train wreck doesn't mean i want to be in one..." - pitdogg2
  • FestYboyFestYboy Posts: 2,447
    edited October 2017
    Missed that! My bad. That's what happens when you skim...

    But I'm with Cody, fix 'em
  • FaustinFaustin Posts: 730
    Fix them.
  • Easy RunninEasy Runnin Posts: 395
    edited October 2017
    Blown resistor?
    HT- Samsung PN50B860/Integra DTR 30.3/Rt55 Fronts
    Rt35i Surrounds/Cs1000p Center/SVS BP1000 Sub
    2CH - B&K MC-101 pre/B&K EX-442 amp/NAD 2400 amp
    Polk SDA1C, Polk Monitor 7, New Large Advents and Polk RTA 8T
    BR - Yamaha CR800/Polk monitor 5
  • pitdogg2pitdogg2 Posts: 10,011
    Blown resistor?

    Very well could be, but I think that would be very visible. OP take a picture and post it. We might be able to spot something.

  • pitdogg2 wrote: »

    Very well could be, but I think that would be very visible. OP take a picture and post it. We might be able to spot something.

    Will do this tomorrow. Thanks!
  • Well, I went over the mechanical issues one more time. Visually, nothing looked out of place, but I wasn't sure the solder had flowed on the tweeter hot lead. Resoldered tweeter wires with hot iron and good flow. Cleaned fuse and fuse holder with wire brush; sprayed with a dab of CRC. Resoldered fuse holder wires as they looked a bit corroded. Held breath, crossed fingers and plugged in. Put on second Traffic album. Kabaaam! Tweetage restored. Pays to go slowly and carefully. I think it was most likely the hot wire to the tweeter which was on but looked like a cold joint. Have to say, Dave at DHS was very helpful and, when I only have one tuition to pay, I may have him upgrade them with new caps and resistors. For now, it's 1979 all over again, baby! Thanks for all the responses. I truly appreciate them.
  • pitdogg2pitdogg2 Posts: 10,011
    That's great to hear. I would of crimped gold plated faston to the wires instead of soldering to the tweeter. Just my personal preference.
    Great job tracking it down
  • la2vegasla2vegas Posts: 2,503
    Good to hear you got them hummin' again. Stick around the forum a lot of good information is constantly flowing around here from some aok guys. Well at least some of us. o:)

    2.3TL, 3.1TL, SDA 2B, SDA II, 7B, 7C, 7 series 2, 10B, 5JR+, 5JR, 5A, 4.5, 4, RTA 11T X2 pairs, RTA 8T, LSI9, LSI7, RTI A7, RTI A3, CSI A4, CSI A6, F/XI A4, RTI4. That's all for now.
  • pitdogg2 wrote: »
    That's great to hear. I would of crimped gold plated faston to the wires instead of soldering to the tweeter. Just my personal preference.
    Great job tracking it down

    Would have been a good solution if I had the faston connectors, but did not think of it beforehand. Thanks.
Sign In or Register to comment.

Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!