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hp35s amazon reviews VS MoHPC reviews
10-29-2017, 09:31 AM
Post: #1
hp35s amazon reviews VS MoHPC reviews
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In my explorations of the MoHPC forums (especially the MyBB version) I read only, well, bad reviews over the 35s. So many, in fact, that I wouldn't touch it with a 10 meter stick.

How come that on amazon the calculator has so many reviews (700+!) with such positive rating?

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10-29-2017, 10:01 AM
Post: #2
RE: hp35s amazon reviews VS MoHPC reviews
Negative reviews in the Forum probably due to the data in this veridical document:

http://www.hpmuseum.org/cgi-sys/cgiwrap/...i?read=735

I find the 35s very comfortable to use & programme.

I have 27 units & use them in my classes.

I didn't intend to get 27, but of the 19 I bought 8 were defective, most of the considerations being about non-functioning keys.

HP did quickly send a replacement unit each time, so I ended up with 27 - 19 working well & 8 crippled but I can't bring myself to throw them away nor can I use them in class.

8 defective in 19 units - Acceptable?
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10-29-2017, 11:28 AM (This post was last modified: 10-29-2017 11:28 AM by pier4r.)
Post: #3
RE: hp35s amazon reviews VS MoHPC reviews
(10-29-2017 10:01 AM)Gerald H Wrote:  8 defective in 19 units - Acceptable?

Well depends on the batch. Sometimes there are batch of hard drives, in 2017, that are a lump of garbage (well now, let's say they have many sectors that die too quickly). We talk about thousands of items.

If a product is always defective, then it is less acceptable.

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10-29-2017, 01:45 PM (This post was last modified: 10-29-2017 01:46 PM by Maximilian Hohmann.)
Post: #4
RE: hp35s amazon reviews VS MoHPC reviews
Hello!

(10-29-2017 09:31 AM)pier4r Wrote:  In my explorations of the MoHPC forums (especially the MyBB version) I read only, well, bad reviews over the 35s. So many, in fact, that I wouldn't touch it with a 10 meter stick.

For some reason, the reviewers on this forum highlighted only the bad aspects of this calculator. The weird bugs, 99,9% of all users will never encounter in real life, and the keyboard issues with some batches.

Myself I have two of these calculators and both have good keyboards. My only criticism is the high battery drain which at least one of my specimens suffers from - it will flatten it's batteries within two months just lying in a drawer. But allegedly only some batches were affected by this illness and someone on this forum found a solution by replacing a capacitor, if I remember correctly (I mainly collect them and don't care too much - just take the batteries out when I'm not using it).

Otherwise I think it is a good calculator with a nicely feeling keyboard in best HP tradition and a well readable display. I would rate it a 8 out of 10 points for a programmable scientific calculator.

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Max
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10-29-2017, 02:59 PM
Post: #5
RE: hp35s amazon reviews VS MoHPC reviews
(10-29-2017 01:45 PM)Maximilian Hohmann Wrote:  For some reason, the reviewers on this forum highlighted only the bad aspects of this calculator. The weird bugs, 99,9% of all users will never encounter in real life, and the keyboard issues with some batches.

If you read all the threads about the '35S, you will see there are many critical ones, but also many positive ones. In general (keyboard and battery flaws aside, seemingly related to mfg batches which all products suffer from) this is a very nice RPN calculator, with a nice mix of features and optional settings. Most of the true shortcomings (e.g. R->P conversion IIRC) have had simple workarounds documented.

I agree 99.9% of users will never notice the issues, they are all fairly esoteric. However the one flaw I could not overlook is the buggy program CRC routines which make it impossible to verify one has properly entered a program from a listing documented with the 'proper' CRC value.

As Dieter and others have quite correctly commented, this is no worse than most earlier models which had no CRC feature at all, with the annoying exception that it can make you review an entered program many times looking for the error that isn't really there. Many folks have tried to characterize that flaw, but as far as I know no one has.

So, yes, it really is a very good calculator for most folks, however the vast majority of members on this Forum do not typically fit in the 'most folks' category. Note that is not criticism, just rationale to understand why a generally popular calculator can appear to have a bad reputation here at MoHPC.

My advice is buy one and try it; most likely you will like it. I like mine and use it often, despite the many flaws and comments I've made about it's issues.

--Bob Prosperi
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10-29-2017, 05:34 PM
Post: #6
RE: hp35s amazon reviews VS MoHPC reviews
(10-29-2017 10:01 AM)Gerald H Wrote:  Negative reviews in the Forum probably due to the data in this veridical document:

http://www.hpmuseum.org/cgi-sys/cgiwrap/...i?read=735

I find the 35s very comfortable to use & programme.

Removed the part of the quote I cannot verify as mine is not defective.
Anyway, I tried the first few of the "buggy" things listed at the mentioned link.

Cos 89,9999999999 (10 9's behind decimal point) Gives 1,74532925199E-12
Wolfram Alpha: 1,74532925199(cont:43295769...)E-12
Within the "range" of the 35s, it's correct.

Tan 89,9999999999: 572957795131
Wolfram: 572957795130,876798...

Please tell me where (and what) is "dud" here.

Listing 5 I don't understand as one can only have 800 indirect stored instances..?

And so, except from not giving "i" in sqrt(-1) and not giving 0^0 as undef (or, as some claim; 1) I'm satisfied with my unit. It works for my planetary calculations. It's easy to program and the RPN is true to the 4-reg stack.
I'd happily give it a 4* reduced for those last things I mentioned.

Esben
28s, 35s, 49G+, 50G, Prime
Elektronika MK-52 & MK-61
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10-29-2017, 06:23 PM
Post: #7
RE: hp35s amazon reviews VS MoHPC reviews
(10-29-2017 05:34 PM)DA74254 Wrote:  Cos 89,9999999999 (10 9's behind decimal point) Gives 1,74532925199E-12
Wolfram Alpha: 1,74532925199(cont:43295769...)E-12
Within the "range" of the 35s, it's correct.

Tan 89,9999999999: 572957795131
Wolfram: 572957795130,876798...

Please tell me where (and what) is "dud" here.

Try comparing the results for cos(89.99), cos(89.999); you will see errors of 7.0E-15 and 1.0E-14 respectively.

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10-29-2017, 06:55 PM
Post: #8
RE: hp35s amazon reviews VS MoHPC reviews
Concerning trig functions see:

http://www.finetune.co.jp/~lyuka/technot...hp35s.html
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10-29-2017, 07:51 PM
Post: #9
RE: hp35s amazon reviews VS MoHPC reviews
(10-29-2017 06:23 PM)Mark Hardman Wrote:  Try comparing the results for cos(89.99), cos(89.999); you will see errors of 7.0E-15 and 1.0E-14 respectively.
Ah, OK.
So better use more digits then ;-)
Then again, the 35s is accurate to 12 digits, thus at E-14 you are beyond the guaranteed accuracy of the calc.

Esben
28s, 35s, 49G+, 50G, Prime
Elektronika MK-52 & MK-61
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10-30-2017, 07:19 AM
Post: #10
RE: hp35s amazon reviews VS MoHPC reviews
Concept of the 35s, being the only worthy successor to the 32SII, is very nice (well done, Tim et al.), implementation is crap. Reviews reflect this contrast.

Still waiting for a 35sII ;-).
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10-30-2017, 09:56 AM (This post was last modified: 10-30-2017 09:57 AM by Csaba Tizedes.)
Post: #11
RE: hp35s amazon reviews VS MoHPC reviews
(10-30-2017 07:19 AM)Thomas Radtke Wrote:  Still waiting for a 35sII ;-).

Yeah, I need a calculator which built quality is like 32SII, functionality like 15C, memory like 35s, SOLVE like 17BII...

... with SD support, IrDA, Bluetooth, WiFi and additionally GPS, MP3 player, full sensors for meteorology observations, sensors for orientation (gyroscope) with integrated monocular (like Zeiss MiniQuick 5x10) for precise sighting, real time clock, stopwatch, timers, daily alarms, moonphase, sunrise/sunset, programmability in Java and C, access to any sensors of course, etc...

Yes, I want my 15C in a 32SII case with all the functions of a smartphone and a CASIO ProTrek+SUUNTO without phone features.

Csaba
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10-30-2017, 10:15 AM
Post: #12
RE: hp35s amazon reviews VS MoHPC reviews
I'd prefer the WP 34S in a pioneer case.

Pauli
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