Results 1 to 12 of 12

Thread: Selmer TV6 from 1964 for repair

  1. #1
    Member Jon Snell's Avatar
    Join Date
    Aug 2015
    Location
    Jurasic Coast, England
    Posts
    171
    Thumbs Up/Down
    Received: 55/0
    Given: 7/0
    Rep Power
    5

    Selmer TV6 from 1964 for repair

    I was sent this amplifier from a person in the UK that as he wasn't confident enough to get this amplifier going, I undertook the repair at the cost of parts only. It is too valuble to get destroyed or lost.
    The story was that it went wrong back in the early 70s and was stored away in the loft until a few weeks ago.
    I suggested it was not powered up as the electrolitycs will need reforming. That was a slow process. I removed the valves except the rectifier, checked for any electrical issues and then fitted a 100k resistor between the output of the EZ80 rectifier and the first tank capacitor. This is very important as it stops any inrush of current that will damage any old electrolyte until it has been reformed, a lot like an old lead acid battery with a similar process but usually more success with electrolitycs.
    The whole process took about 24hours before the leakage current was reduced to uAmps and then I check and replace the faulty components.
    There was a few components that were out of tollerance and were replaced. The original fault was a faulty EL84. Intermittant Screen grid short to Supressor grid. Not that unusual but the valve looked original, so I forgive Mr Mullard.
    I enclose a few photographs for interest and still carry out 'hospital jobs' at cost. Another interesting part of our history.
    Thank you for looking and hope you find this interesting.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Multi cell capacitor.jpeg 
Views:	43 
Size:	1.04 MB 
ID:	57620   Click image for larger version. 

Name:	After 1hour reforming almost complete.jpeg 
Views:	40 
Size:	1.09 MB 
ID:	57621   Click image for larger version. 

Name:	Testing a NOS EL84.jpeg 
Views:	42 
Size:	1.19 MB 
ID:	57622   Click image for larger version. 

Name:	Showing the 1200R that measures 178R.jpeg 
Views:	47 
Size:	1.04 MB 
ID:	57623   Click image for larger version. 

Name:	Happy heaters.jpeg 
Views:	40 
Size:	936.9 KB 
ID:	57624   Click image for larger version. 

Name:	Old parts.jpeg 
Views:	40 
Size:	567.9 KB 
ID:	57625   Click image for larger version. 

Name:	All now working.jpeg 
Views:	41 
Size:	1.10 MB 
ID:	57626  


    4 Not allowed! Not allowed!
    Support for Fender, Marshall, Mesa, VOX and many more. https://jonsnell.co.uk

  2. #2
    Senior Member
    Join Date
    Jun 2006
    Location
    Norristown state hospital
    Posts
    2,392
    Thumbs Up/Down
    Received: 215/4
    Given: 1/0
    Rep Power
    17
    Cool old amp!

    A friend just picked up a Selmer Zodiac Twin that belonged to Eric Bazilian of the Hooters.(semi famous Philly band)

    0 Not allowed! Not allowed!

  3. #3
    Member Jon Snell's Avatar
    Join Date
    Aug 2015
    Location
    Jurasic Coast, England
    Posts
    171
    Thumbs Up/Down
    Received: 55/0
    Given: 7/0
    Rep Power
    5
    Nice!
    Look after it, there are not many left.

    0 Not allowed! Not allowed!
    Support for Fender, Marshall, Mesa, VOX and many more. https://jonsnell.co.uk

  4. #4
    Supporting Member mozz's Avatar
    Join Date
    Oct 2015
    Location
    NEPA
    Posts
    883
    Thumbs Up/Down
    Received: 222/2
    Given: 159/0
    Rep Power
    5
    Who made those white resistors with the orange ends?

    0 Not allowed! Not allowed!

  5. #5
    Old Timer
    Join Date
    May 2006
    Location
    Chill-Ville, VA
    Posts
    3,455
    Thumbs Up/Down
    Received: 856/6
    Given: 1,765/10
    Rep Power
    19
    Sweet old amp! I scored a couple EF86s like that in an old projector from a school. Along with a Telefunken & Seimens EL84 each. Couple Mullard ECC81s also.

    Justin

    0 Not allowed! Not allowed!
    "Wow it's red! That doesn't look like the standard Marshall red. It's more like hooker lipstick/clown nose/poodle pecker red." - Chuck H. -
    "Of course that means playing **LOUD** , best but useless solution to modern sissy snowflake players." - J.M. Fahey -
    "All I ever managed to do with that amp was... kill small rodents within a 50 yard radius of my practice building." - Tone Meister -

  6. #6
    Member Jon Snell's Avatar
    Join Date
    Aug 2015
    Location
    Jurasic Coast, England
    Posts
    171
    Thumbs Up/Down
    Received: 55/0
    Given: 7/0
    Rep Power
    5
    Probably Mullard, long time ago, I just remember them as 'Carbon Drifters'.

    0 Not allowed! Not allowed!
    Support for Fender, Marshall, Mesa, VOX and many more. https://jonsnell.co.uk

  7. #7
    Supporting Member
    Join Date
    Dec 2009
    Location
    UK
    Posts
    3,828
    Thumbs Up/Down
    Received: 507/1
    Given: 102/0
    Rep Power
    14
    Quote Originally Posted by mozz View Post
    Who made those white resistors with the orange ends?
    They're made by Erie in the UK. They were the most common resistors here up until maybe the early to mid '60s. Because they're formed inside a ceramic tube it makes them quite bulky for their power rating.

    1 Not allowed! Not allowed!

  8. #8
    Supporting Member mozz's Avatar
    Join Date
    Oct 2015
    Location
    NEPA
    Posts
    883
    Thumbs Up/Down
    Received: 222/2
    Given: 159/0
    Rep Power
    5
    Friend has a old fuzzface, original I think, that had those resistors. He wanted me to find some but if they are known to be bad could be a moot point. Maybe he's just trying to get it back to stock looks to increase collector value.

    0 Not allowed! Not allowed!

  9. #9
    Member Jon Snell's Avatar
    Join Date
    Aug 2015
    Location
    Jurasic Coast, England
    Posts
    171
    Thumbs Up/Down
    Received: 55/0
    Given: 7/0
    Rep Power
    5
    They are not 'bad' but merely old and getting a little unreliable. Most were rated at 1/4 Watt and driven a bit harder, anode load resistors come instantly to mind, they change value under load.
    If you look at older equipment, as I do, it is good to remember the old resistor chart, Body, Tip Dot.
    I still have my Radio Spares resistor kit complete with most values of carbon drifters.
    The case dates back to the early 70s but cannot remember the cost at the time.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Screenshot 2020-04-02 at 14.04.51.png 
Views:	21 
Size:	311.2 KB 
ID:	57667  

    0 Not allowed! Not allowed!
    Support for Fender, Marshall, Mesa, VOX and many more. https://jonsnell.co.uk

  10. #10
    Supporting Member
    Join Date
    Dec 2009
    Location
    UK
    Posts
    3,828
    Thumbs Up/Down
    Received: 507/1
    Given: 102/0
    Rep Power
    14
    I sometimes get older AC30s which are populated with Erie resistors. They do drift, but I don't replace them unless there's a problem. The same with Rangemasters and Fuzz faces - they can drift in a way that gives a pedal a desirable sound. the higher value resistors drift more and plate load resistors can be noisy, so that can be a problem if excessive. It's worth remembering though that Erie made hi-stab versions using the same ceramic body construction. Rather than carbon these are metal film and are an excellent replacement where noise and stability are key. At one time B&W TV sets were a good source of these as 'pulls'.

    Erie was founded in the USA - did the factory there make the same component style as the UK? I can't recall seeing American equipment with these installed.

    0 Not allowed! Not allowed!

  11. #11
    Member Jon Snell's Avatar
    Join Date
    Aug 2015
    Location
    Jurasic Coast, England
    Posts
    171
    Thumbs Up/Down
    Received: 55/0
    Given: 7/0
    Rep Power
    5
    The High Stability resistors had the pink band on them and mostly they were 10% tolerance, sometimes 5% with the gold band as well.
    Cannot speak for USA though but I remember most chassis built in the 60s had those resistors fitted.
    I still get the early AC30s in for refurb with those in and as you do, only replace the faulty ones. I found a source of the 8u - 8u twin pack electrolytics, nice to fit the correct value and look components.
    Good to hear from you and keep safe and well.

    0 Not allowed! Not allowed!
    Support for Fender, Marshall, Mesa, VOX and many more. https://jonsnell.co.uk

  12. #12
    Supporting Member mozz's Avatar
    Join Date
    Oct 2015
    Location
    NEPA
    Posts
    883
    Thumbs Up/Down
    Received: 222/2
    Given: 159/0
    Rep Power
    5
    I've got a bunch of 2.7meg, i think these are Erie, if UK made i don't know how they got over here. They all measure exactly 3.4meg which seems odd but they were all stored in the same container since the 70's.Click image for larger version. 

Name:	20200403_161122.jpg 
Views:	18 
Size:	140.0 KB 
ID:	57723

    1 Not allowed! Not allowed!

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. 1964 Ampeg Jet Questions
    By Triocd in forum Vintage Amps
    Replies: 30
    Last Post: 08-31-2015, 01:26 AM
  2. 1964 Deluxe Reverb
    By Doc Stitches in forum Maintenance, Troubleshooting & Repair
    Replies: 13
    Last Post: 06-14-2014, 02:04 AM
  3. 1964 Revererocket
    By doog in forum Repair and Restoration
    Replies: 3
    Last Post: 04-19-2013, 09:22 AM
  4. 1964 Fender Vibroverb
    By futureblues in forum Vintage Amps
    Replies: 11
    Last Post: 09-01-2012, 07:42 AM
  5. 1964-65 Formvar?
    By voodoochild in forum Pickup Makers
    Replies: 22
    Last Post: 10-04-2010, 09:04 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •