Re: HP 67 with some dim leds Message #5 Posted by Geoff Quickfall on 27 Aug 2009, 4:53 p.m., in response to message #1 by juan demin
Yes it is normal,
I have 5 HP-67's including a New Old Stock model and they all vary in brightness (evenly) between each other.
The two HP-65's I have are both brighter then the HP-67's.
Since the HP-67 is related to the HP-21 through HP-29C series; i.e. it is a Woodstock, one should ALWAYS have good batteries in it when using the charger. In fact, the best thing to do is to purchase an external reserve power pack 82004A and never use the charger for the HP-67.
Also, modify any Woodstock battery packs (remove the centre spine and this will allow access to the batteries and the ability to swap out dead ones for recharged versions) to accept regular NiCd or NiMh batteries and charge them with a generic rechargeable supply. NEVER NEVER use the chargers with the Woodstocks UNLESS you are certain there is NOTHING wrong with the battery pack. A good rule is to never use the charger/adapters with the Woodstocks including the HP-67.
Cheers, Geoff
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