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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders. |
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30th Dec 2018, 11:36 pm | #1 |
Pentode
Join Date: Dec 2018
Location: County Meath, Ireland
Posts: 242
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Avometer - damping meter for transportation
Folks,
Is there a dial setting to dampen the meter before shipping? Ray |
30th Dec 2018, 11:54 pm | #2 |
Dekatron
Join Date: Aug 2016
Location: Colchester, Essex, UK.
Posts: 4,081
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Re: Avometer - damping meter for transportation
Meter model and mark?
Later ones have the facility to be set to OFF on both selectors, i believe... Earlier ones of 20,000ohms/volt (Model 8 or 9) can be effectively damped by using wire to short pos terminal to neg terminal and setting to DC....50uA range. With a less sensitive meter such as a Model 40 this is not very effective. Dave |
31st Dec 2018, 6:18 am | #3 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,801
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Re: Avometer - damping meter for transportation
Set the AC knob to 'DC' and set the DC knob to 'AC' then give the unit a swing to see if the pointer is damped. This works on a lot of AVO 8s
David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done |
31st Dec 2018, 9:42 am | #4 |
Pentode
Join Date: Dec 2018
Location: County Meath, Ireland
Posts: 242
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Re: Avometer - damping meter for transportation
Thanks Guys,
It's a Model 8 MK3. |
31st Dec 2018, 10:47 am | #5 |
Dekatron
Join Date: Aug 2016
Location: Colchester, Essex, UK.
Posts: 4,081
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Re: Avometer - damping meter for transportation
Ah, so the 'DC-50uA and terminals shorted' will work perfectly. If the movement is in really good condition when the meter is disturbed the needle will still -very slowly- return precisely to zero. Give it a try.
Dave |
31st Dec 2018, 11:24 am | #6 |
Pentode
Join Date: Dec 2018
Location: County Meath, Ireland
Posts: 242
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Re: Avometer - damping meter for transportation
It's not in my possession just yet Dave.
The seller has to ship it to me , I've passed in the settings to him. Looking forward to this, haven't had one in my hands for about 35 years! Cheers Ray |
31st Dec 2018, 1:50 pm | #7 |
Dekatron
Join Date: Aug 2016
Location: Colchester, Essex, UK.
Posts: 4,081
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Re: Avometer - damping meter for transportation
..All three of the working examples i have had, required adjustment to the leaf switches, but once that was done (and the magnetic shunt recalibrated slightly) they worked 'as new'.
Dave |
31st Dec 2018, 6:20 pm | #8 |
Octode
Join Date: Sep 2017
Location: Bristol, UK.
Posts: 1,642
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Re: Avometer - damping meter for transportation
I have an Avo 8 Mk5, and the movement damping seems fine with the DC switch set to "Off" and the AC switch set to "DC". Am I right to feel this is OK for transportation?
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31st Dec 2018, 8:43 pm | #9 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,801
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Re: Avometer - damping meter for transportation
I've been doing it that way for decades and various marks of Avo 8.
- With only one incident, but as I dropped it in the attic and it fell through the access hole, bounced on the ladder and then went down the house stair to ground level, damage was inevitable. It was a late model plastic cased one and though the movement had suffered, the case was still intact. David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done |
31st Dec 2018, 9:41 pm | #10 |
Pentode
Join Date: Dec 2018
Location: County Meath, Ireland
Posts: 242
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Re: Avometer - damping meter for transportation
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12th Jan 2019, 6:05 am | #11 |
Banned
Join Date: Jan 2018
Location: Rosthern, Saskatchewan, Canada.
Posts: 39
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Re: Avometer - damping meter for transportation
My 8 Mark V also Is considerably dampened when switched to off position as I read this somewhere. I notified the seller to switch it off before shipping. Nothing wrong with it and it definitely swings next to nothing on the off position. Has the leather case but needs repair as the cotton stitch is letting go. Hopefully my gamble paid off as I discovered the older units are much more repairable if fallen into wrong hands during operation.
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13th Jan 2019, 12:34 am | #12 |
Octode
Join Date: May 2016
Location: Oxfordshire/Bucks borders, UK.
Posts: 1,604
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Re: Avometer - damping meter for transportation
As has been said,
Model 8 Mk1-4 and model 9: Set to DC and 50uA and short the + and - terminals. Model 8 Mk 5/6/7 simply set to off and dc, there is an internal short engaged for transit. Though this isn't to be used in place of sufficient packaging to ensure every bump and drop can be absorbed.
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Avometer, vintage Fluke and Marconi collector. Also interested in vintage Yaesu and KW. |
13th Jan 2019, 12:41 am | #13 |
Pentode
Join Date: May 2018
Location: Cologne, Germany
Posts: 104
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Re: Avometer - damping meter for transportation
Good info, should maybe be in the FAQ..
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