The Museum of HP Calculators

HP Forum Archive 18

 (deleted post)Message #1 Posted by deleted on 14 Nov 2008, 8:02 p.m. This Message was deleted. This empty message preserves the threading when a post with followup(s) is deleted. If all followups have been removed, the original poster may delete this post again to make this placeholder disappear.

 Re: Possible Silver 17bii+ Actuarial Inaccuracy: compare against 12c, 27s, 17bii, and moreMessage #2 Posted by Scott Newell on 14 Nov 2008, 8:14 p.m.,in response to message #1 by deleted 20B gives \$1799.80 as well.

 Re: Possible Silver 17bii+ Actuarial Inaccuracy: compare against 12c, 27s, 17bii, and moreMessage #3 Posted by Don Shepherd on 14 Nov 2008, 8:22 p.m.,in response to message #1 by deleted Allen, my 17BII+ Silver (serial CNA72600010) gives pmt=1799.80, as does my 12c, 12cp, 17B, 17BII, and 17BII+ Gold. I wonder if this may indicate a bug in a later ROM release of the silver (assuming they changed the ROM between my serial number and yours).

 Re: (deleted post)Message #4 Posted by Allen on 14 Nov 2008, 8:43 p.m.,in response to message #1 by deleted Sorry! I found the solution to the question above by checking the BEGIN/END settings which are not reset on the 17bii+ when the Machine is soft reset. When I tried to delete the question above it kept the other responses, making for a silly looking thread. :( sorry. If you'd like to see the question: I was doing a Financial Calculator bake off with a number of HP models today and have become puzzled by the following Amortization: N=180 (15 year) I/YR= 5.875 PV=\$215,000 PMT= Solve FV=\$0 When run on every other calculator I have including 48g, 27s, 12c 12cp, 12cp-25th, 17bii, 17bii+(gold), 14b-50th, and 10b, and even MS Excel I get PMT=(\$1,799.80) but the Silver 17bii+ says I should pay (-1791.04). I've reset all machines, confirmed P/YR=12 values. When I set I/YR to 0% the Silver 17bii+ agrees with the others, but becomes slightly off for any value non-zero of I. I have tried several other scenarios, varying N, and PV, and for non-zero interest values the 17bii+ Gold and Silver do not agree. Perhaps there is something else I'm missing? FWIW, 17bii+ SN is CNA81102019.

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