Link555 What exactly does an overhaul entail on one of those?

I have several very 'experienced' DN series EQs that as far as I can tell still work perfectly, but maybe they'd benefit from some new capacitors etc. They sure don't get used as much as they used to.

Klark makes the only equipment I've ever had in any of my racks that designated Pin#2 on the XLR connectors as cold (-) and Pin#3 as hot (+).

dvdhawk, post: 464272, member: 36047 wrote: Link555
Klark makes the only equipment I've ever had in any of my racks that designated Pin#2 on the XLR connectors as cold (-) and Pin#3 as hot (+).

OTARI tape decks?

the squiggly lines in the second image, L1 thru L26 ... are those inductors?

Kurt Foster, post: 464275, member: 7836 wrote: The squiggly lines in the second image, L1 thru L26 ... are those inductors?

Yes.

yum! i like inductor eq.

Kurt Foster, post: 464278, member: 7836 wrote: yum! i like inductor eq.

You might have second thoughts about that if you looked at the phase response curve of the unit!

PA use only was my motto for narrowband filters.

Kurt Foster, post: 464275, member: 7836 wrote: OTARI tape decks?

I never had any Otari tape decks, so I will gladly defer to you on that.

Boswell, post: 464286, member: 29034 wrote: PA use only was my motto for narrowband filters.

We used our Klarks on Main FOH and Monitor Mixes and found them to be smoother than most. Our thinking was, if it's good enough for Clair Brothers... I also have a BSS Opal series I like the sound of.

Was there anything else available at the time (1985-2005) that a mere mortal could afford that was head and shoulders above Klark in live PA applications? Were we missing out on something better at roughly the same price?

We used a couple of the Klark parametrics too, which don't really fit the narrowband filter category. But do they have idiosyncrasies of their own?

Boswell, post: 464286, member: 29034 wrote: You might have second thoughts about that if you looked at the phase response curve of the unit!

PA use only was my motto for narrowband filters.

What does phase response sound like if you're not mixing it with a version of the same signal with different phase?

dvdhawk, post: 464272, member: 36047 wrote: Link555 What exactly does an overhaul entail on one of those?

Klark makes the only equipment I've ever had in any of my racks that designated Pin#2 on the XLR connectors as cold (-) and Pin#3 as hot (+).

The overhaul is a recap of the power supply caps, adding Jensen input and output xfrmrs and fixing the pin3 hot thing... make pin2 the hot.

If you put pin 2 hot signal into the pin 3 hot device, doesn't the signal come out the other end with the same polarity as it went in? Isn't it really only where you have a mixed balanced/unbalanced device where it matters?

I know there is a lot of debate on this topic but I believe you are correct for balanced gear as. Long as the input and output are the same polarity it doesn't matter....however this unit is interesting ....depending on the model some were unbalanced, some had input transformers. And we're balanced. The units I am working are different. Two have unbalanced inputs and outputs , and one has an unbalanced input and balanced transformer output....the owners wants them all to be balanced in and out with jensen xfmrs....

I just obtained one of these--a mid 80s DN27A with the input and output balancing transformers, but it's got a broken power switch and a few broken faders, all the fader knobs are missing. Would anyone be able to point me to a source where I can buy replacement parts? I'm thinking besides those it'll need the electrolytics in the PSU replaced, too. Any additional advice would be greatly appreciated! 

I have repaired quite a few of these now…tell me exactly what you need and I can tell where I sourced the parts 

That would be great, thank you! I need two fader sliders, along with replacement fader knobs—all of them, and finally a power switch. Any leads you can provide would be greatly appreciated!

Where are you located? In North America Digikey will have the power switch…

https://www.digikey…

for the faders those are harder…if I remember correctly the originals are no longer made. I did find a 10k Panasonic  one that would fit. For the knobs I use a factory in China that can make almost any mould injection pot top

https://www.chinada…
 

Really good customer service even for small orders. 

Wow I would have never found these websites! I just ordered a power toggle switch, the 10k faders. Thank you so much, Link!!

Hi Link would you also share which transformers you would recommend? I just received a DN27 and am studying the schematic. Like your client I’m looking to have both the input and outs balanced. Many thanks!

https://www.jensen-…

by far my favourite, very transparent…. Not cheap, but very high quality. 

I used both there line input and Lind output transformer for these guys,

Thanks as always, Link! I just found your other thread in modifying a few DN27As for a client who sent you six to work on—wow! Thank you for sharing your knowledge and experience with us. I’m away from my DN27 and forgot to check whilst I had it open the other day but do you happen to know if the 220v transformer has taps for 110v? If not, I’ll have to get something like a step down transformer. 

  I have repaired/modified  12 units to date with almost  that many manufacturing variations, but all the ones I worked on  had a 110 to 220VAC switch installed