[Test-Equipment] HP audio oscillator FS?

Tue Dec 13 17:19:36 EST 2016

I used small, flat-head screws (can't remember if they were #4-40 or #6-32) but they nestled rather nicely into the old rivet's countersunk hole in the loops.  They didn't look nearly as bad as I had thought it would.

Thanks,
Barry - N4BUQ

----- Original Message -----
> From: "Richard Knoppow" <1oldlens1 at ix.netcom.com>
> To: test-equipment at mailman.qth.net
> Sent: Tuesday, December 13, 2016 4:07:56 PM
> Subject: Re: [Test-Equipment] HP audio oscillator FS?
> 
> e-mail Brettuns, they are very helpful, will give you exact
> dimensions and will also special order stuff not in their catalog.
>       There are inexpensive riveters available at hardware stores and
> places like Home Depot. Once you have the tool you will find many
> applications for it.
> http://www.harborfreight.com/hand-tools/hand-riveters/hand-riveter-set-38353.html
> 
> 
> 
> On 12/13/2016 12:19 PM, Barry wrote:
> > I had Brettuns Village make a handle for my 410B.  It is folded and
> > stitched.  I really don't care for the belt-buckle variety.  The one I
> > have is "okay" but would like something closer to the original.
> >
> > I don't recall, however, seeing the "Stitched Leather Handle with Mounting
> > Rings" offering shown on that page.  I don't know if it's the correct
> > length to fit in the existing loops but if it is, that would be a very
> > nice replacement.  Of course, it requires drilling the old brackets and
> > then reattaching with screws (unless you happen to have a riveter...) but
> > once I did that, it really isn't very noticeable.
> >
> > Thanks,
> > Barry - N4BUQ
> >
> > ----- Original Message -----
> >> From: "Richard Knoppow" <1oldlens1 at ix.netcom.com>
> >> To: test-equipment at mailman.qth.net
> >> Sent: Tuesday, December 13, 2016 1:59:38 PM
> >> Subject: Re: [Test-Equipment] HP audio oscillator FS?
> >>
> >> A workable but identical handle for -hp- instruments like the 200CD
> >> and 410B can be gotten from
> >>
> >>
> >> http://www.brettunsvillage.com/trunks/howto/parts/schandles.htm
> >>
> >>     The ones I've used are the kind with a loop and buckle, they will
> >> fit the existing staples on the case. To use other handles you must
> >> remove the staples to get the handles on them. Since clearance inside is
> >> limited you must use rivets to replace them, screws stick out too far.
> >>       The key for a 200CD and other oscillators using lamps in the
> >> circuit is to make sure the lamps make good contact with the sockets.
> >> The quality of the lamps make a difference in the distortion. -hp-
> >> "aged" the lamps but I found out that they just ran new lamps up to
> >> barely visible heat and then backed the voltage down slowly, the idea
> >> being to relieve strains in the filaments. The late 200CD could be
> >> tweeked to much less than half the distortion spec and still be stable.
> >> Very early ones would often just make the spec.
> >>      If yours has bent capacitor plates just leave them, that was a part
> >> of the adjustment at the factory.
> >>
> >> On 12/13/2016 8:01 AM, Barry wrote:
> >>> I think mine had some issues that most likely pointed to dirty power as
> >>> well.  I'd intended to refurbish it to some degree but in a fit of
> >>> downsizing, I sold it.  I have other audio generators but there's just
> >>> something about that big old tube gear that attracts me to it.  This one
> >>> was in pretty nice shape too.  I think that handle might have been a
> >>> replacement and sure wish I could find some of those as my 410B could use
> >>> a better handle.
> >>>
> >>> Good luck with your new acquisition.
> >>>
> >>> Barry - N4BUQ
> >>>
> >>> ----- Original Message -----
> >>>> From: "Brian Burns" <brian at lessonsinlutherie.com>
> >>>> To: "Discussion of Electronic Test Equipment"
> >>>> <test-equipment at mailman.qth.net>
> >>>> Sent: Tuesday, December 13, 2016 9:55:44 AM
> >>>> Subject: Re: [Test-Equipment] HP audio oscillator FS?
> >>>>
> >>>> Hello Barry,
> >>>>
> >>>> Yep, that's the one all right. I wish I had kept mine, but it was
> >>>> blowing
> >>>> fuses. It turned out to just need new filter caps in the power
> >>>> supply---they
> >>>> had shorted.
> >>>>
> >>>> Cheers,
> >>>>
> >>>> Brian
> >>>>
> >>>>
> >>>>
> >>>>
> >>>> ---Original Message-----
> >>>> From: Test-Equipment [mailto:test-equipment-bounces at mailman.qth.net] On
> >>>> Behalf Of Barry
> >>>> Sent: Tuesday, December 13, 2016 7:24 AM
> >>>> To: Discussion of Electronic Test Equipment
> >>>> Subject: Re: [Test-Equipment] HP audio oscillator FS?
> >>>>
> >>>> Sold mine a few years back.
> >>>>
> >>>> http://www.knology.net/~thelanding/ForSale/images/hp200cd-2.JPG
> >>>>
> >>>> Kinda wish I hadn't done that now...
> >>>>
> >>>> Thanks,
> >>>> Barry - N4BUQ
> >>>>
> >>>> ----- Original Message -----
> >>>>> From: "Ian Wilson" <ianmwilson73 at gmail.com>
> >>>>> To: "Discussion of Electronic Test Equipment"
> >>>>> <test-equipment at mailman.qth.net>
> >>>>> Sent: Tuesday, December 13, 2016 9:06:01 AM
> >>>>> Subject: Re: [Test-Equipment] HP audio oscillator FS?
> >>>>>
> >>>>> Hi Brian,
> >>>>>
> >>>>> If you are still looking I have one of the 200 models. Yours for
> >>>>> shipping (I was reluctantly thinking of parting it out - gasp).
> >>>>>
> >>>>> 73, ian
> >>>>>
> >>>>> On Tue, Nov 8, 2016 at 5:22 PM, Brian Burns
> >>>>> <brian at lessonsinlutherie.com>
> >>>>> wrote:
> >>>>>
> >>>>>> Hello All,
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> Some years ago I was on a forum that was for HP test equipment
> >>>>>> buffs---now that's pretty arcane! Anyway, I ended selling and
> >>>>>> trading various pieces of equipment, and silly me I let my HP 200
> >>>>>> (?) audio oscillator go. Now I need it, or one functionally like it,
> >>>>>> again. I'm leery of buying one on ebay, and thought I would see if
> >>>>>> any of you guys have something for sale.
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> Cheers,
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> Brian Burns
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> Toll free: 866-214-9472
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> ---
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> >>
> >> --
> >> Richard Knoppow
> >> 1oldlens1 at ix.netcom.com
> >> WB6KBL
> >> ______________________________________________________________
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> 
> --
> Richard Knoppow
> 1oldlens1 at ix.netcom.com
> WB6KBL
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