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UT5A 

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 27  

 

 

THE RAMSEY KIT WARRANTY 

 

1.  GENERAL: 

Notice that this is not a "fine print" warranty.  We want you to understand your rights and ours too!  All Ramsey kits will work if 
assembled properly. The very fact that your kit includes this new manual is your assurance that prior to release of this kit, a 
varied group of knowledgeable people have assembled this kit from scratch using this manual.  During this process, changes 
and additions are noted by each assembler and integrated into the final version of the manual…which you have!  If you need 
help, please read through your manual carefully, all information required to properly build and test your kit is contained within 
the pages!  However, customer satisfaction is our goal, so in the event that you do have a problem, please note the following: 
 

2. DEFECTIVE PARTS: 

It's always easy to blame a part for a problem in your kit.  Before you conclude that a part may be bad, thoroughly check your 
work. Today's semiconductors and passive components have reached incredibly high reliability levels, and it’s sad to say that 
our human construction skills have not!  But on rare occasions a sour component can slip through.  All of our kit parts carry the 
Ramsey Electronics Warranty that they are free from defects for a full ninety (90) days from the date of purchase.  Defective 
parts will be replaced promptly at our expense.  If you suspect any part to be defective, please mail it to our factory for testing 
and replacement.  Please send only the defective parts), not the entire kit.  The part's) MUST be returned to us in suitable 
condition for testing. Please be aware that testing can usually determine if the part was truly defective or damaged by assembly 
or usage.  Don't be afraid of telling us that you “damaged it” or “burned it out”, we're all human and in most cases, replacement 
parts are very reasonably priced.  Remember, our goal for over three decades is to have a happy customer, and we’re here to 
work WITH you, not AGAINST you! 
 

3. MISSING PARTS: 

Before assuming a part value is missing, check the parts listing carefully to see if it is a critical value such as a specific coil or 
IC, or whether a RANGE of values is suitable for the component (such as a "100 to 500 uF capacitor").  Often times, common 
sense will solve a mysterious missing part problem.  If you're missing five 10K ohm resistors and received five extra 1K 
resistors, you can pretty much be assured that the “1K ohm” resistors are actually the “missing” 10 K parts ("Hum-m-m, I guess 
the orange band really does look red!")  Ramsey Electronics project kits are packed with pride in the USA by our own staff 
personnel.  While separate QC checks are made on all product kits, we too are human, and once in a great while there is a 
chance something can get through those checks!  If you believe we packed an incorrect part or omitted a part clearly indicated 
in your assembly manual for your Ramsey kit, please contact us with information on the part you need.  Contact our Repair 
Department via telephone, email or writing.  Please have your invoice number and date of purchase handy. 
 

4. REFUNDS: 

All Ramsey products, kit or factory assembled units have an unconditional 10 day (from the date of purchase) return policy to 
examine our products. If you are not satisfied for any reason, you may return your unassembled kit with all the parts and 
instructions, or your factory assembled and tested product, together with your proof of purchase to the factory for a full refund 
less shipping. The return package should be packed securely. Insurance and tracking is highly recommended.  A reminder, this 
applies to unassembled kits.  They must be in the same new condition as received, not partially assembled!  Assembled kits 
cannot be returned for credit.  No RMA’s are required; simply return to Ramsey Electronics LLC, Attn: Product Returns, 590 
Fishers Station Drive, Victor, NY, 14564.  If you have any questions, please contact us at 585-924-4560. 
 

5. FACTORY REPAIR OF ASSEMBLED KITS:

  

Most of us at Ramsey are technically oriented and we do realize that things happen!  Even following the best practices, with all 
of the best intentions, there is that chance that your kit doesn’t work when you have completed it.  Each manual goes into 
detailed troubleshooting based on the specific kit to help you troubleshoot the problem.  We have found that 95% of returned 
kits involved wrongly installed components (wrong part or backwards polarity).  This section of the warranty assumes you have 
gone through all those steps, and have now reached the point that you need to send it back. 
 
To qualify for factory repair of customer assembled kits, the following conditions apply: 

1. 

Kits must not be assembled with acid solder flux 

2. 

Kit boards or circuits must not be modified in any manner from the version received 

3. 

Kits must be fully assembled, not partially assembled.  Our warranty does not include “finishing” your kit! 

4. 

Must include a full description of the problem encountered including the troubleshooting steps you have already done. 

5. 

Must not include non-standard, non-Ramsey accessories, cases, enclosures, knobs, etc. or any batteries. 

6. 

Must include the minimum repair fee of $25 USD in the form of check, money order or credit card authorization. 

7. 

Ramsey Electronics, LLC reserves the right to refuse any repair due to excessive errors in construction methods. 

8. 

If, due to customer construction methods, the repair is estimated to exceed the minimum flat rate, Ramsey Electronics, 
LLC will contact the customer to discuss the repairs needed and to receive authorization and payment for repair prior 
to repair. 

9. 

In the unlikely case that a defective part is found to be the cause of the problem, the repairs will be made at no-charge 
to the customer, and any payments received for repair will be returned or credited back to the customer. 

10.  Properly pack your kit, insure the package, and use a carrier that can be tracked.  Ramsey Electronics, LLC is not 

responsible for any loss or damage in shipment.  Send the package together with your repair fee to the return address 
below. No RMA is required. 

 

6. FACTORY REPAIR FEES:

  

Please understand that our Tech Support Group personnel are not volunteers!  They are a dedicated group of highly trained 
technicians each configured with a very properly equipped test bench.  Upon receipt of a repair, the setup, testing, diagnosis, 
repair, paperwork, and repacking of your kit requires nearly an hour of their time regardless of the size or complexity of the kit!  
The minimum repair fee represents ½ hour Tech Support time at $50/hour USD.  We try to keep all kit repairs within the realm 
of the $25 flat rate whenever possible…and trust us; we exceed that time spent on most kits received more often than not! 
 

7. CONTACT INFORMATION AND RETURN ADDRESS: 

 
 

Technical Questions

 

Product Repair & Returns

 

RAMSEY ELECTRONICS, LLC 

Attn:  Tech Support 

590 Fishers Station Drive 

Victor, NY  14564 

585-924-4560; 585-924-4886 Fax 

[email protected] 

RAMSEY ELECTRONICS, LLC 

Attn:  Repairs 

590 Fishers Station Drive 

Victor, NY  14564 

585-924-4560; 585-924-4886 Fax 

[email protected] 

Summary of Contents for UT5A

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Page 4: ...CC through R1 to C1 s input J2 pin3 allows us to bring a negative signal into the timer at C1 With a negative input D1 is turned off thus preventing Q1 from effecting the input signal 2 POSITIVE INPUT...

Page 5: ...ightly less than the original pulse The positive short duration pulse will have its amplitude limited by D2 to a maximum of VCC 0 7V This is to prevent false operation of the timer IC JMP2 Input Selec...

Page 6: ...Pin out and Function It also can be used for pulse width and pulse position modulation C4 is a filter capacitor that ensures noise does not effect timer operation R8 allows the Control Voltage to be...

Page 7: ...OF OPERATION Note For these explanations we will assume no Control Voltage input Only basic operation is covered here Monostabe Mode In Monostable mode the timer acts as a one shot pulse generator It...

Page 8: ...the use of a control voltage will change the Threshold level of the IC therefore change the RC timing and the pulse width PW 1 1 C2 R4 R5 Astable Mode In the Astable no stable states mode the timer is...

Page 9: ...we begin the process over again Formulas for calculating Pulse Width PW and Rest Time RT follow assuming no control Voltage used PW 0 693 C2 R4 R5 R6 R7 RT 0 693 C2 R6 R7 Total Time T can be calculat...

Page 10: ...UT5A 10 UT5A PARTS LAYOUT DIAGRAM...

Page 11: ...arked yellow violet yellow R5C 7C 2 1M ohm resistors marked brown black green R5D 7D 2 50k potentiometer orange top marked 503 R4A 6A 1 100k potentiometer orange top marked 104 R8 2 500k potentiometer...

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Page 14: ...rity They can be in stalled in either direction All resistors in this kit are stand up resistors The pad with the silkscreen circle is the pad that the body of the part sits on 13 Install R3 another 1...

Page 15: ...negative lead This can be verified by looking for the sign in the stripe On rare occasions this stripe with have a sign indicating a positive polarity The PC board or Parts Layout Diagram will show t...

Page 16: ...le Pulse Width chart in addition to Pulse Width it also provides Rest Time Total Time and Frequency This chart it assumes that R4 R6 and R5 R7 which is not required You may mix and match the potentiom...

Page 17: ...6 S 16 5 S C2 1000uF R4 1k 1 1 S 56 1 S 551 1S 9 2M R4 47k 51 7S 106 7S 1 8M 602S 10M R4 82k 90 2 S 1 5M 145 2S 2 4M 640S 10 7M R4 470k 517S 8 6M 572 S 9 5 M 1067S 17 8M R4 1M 1100 S 18 3 M 1155 S 19...

Page 18: ...0 2 Hz 9 3 Hz 4 9 Hz 0 1 uF R5 7 1M R4 6 1 05M R4 6 1 5M PW 138 6 mS 145 5 mS 207 9 mS RT 69 3 mS 72 8 mS 104 0 mS TT 207 9 mS 218 9 mS 311 9 mS FREQ 4 8 Hz 4 6 Hz 3 2 Hz 10uF R5 7 1k R4 6 51k R4 6 50...

Page 19: ...6 547k PW 65 1 S 1 M 134 4S 2 2M 758 1 S 13 6 M RT 32 6 S 54 M 67 2 S 1 1 M 379 1 S 6 3 M TT 97 7 S 1 6 M 201 7 S 3 4M 1137 2 S 19 0 M 1000uF R5 7 82k R4 6 132k R4 6 582k PW 113 7 S 1 9 M 183 S 3 1 M...

Page 20: ...current then you will need the pull up resistor Place a Shorting Block on the pins of JMP2 5 If the input signal is a square wave or wide duration pulse you will probably need the signal to be differ...

Page 21: ...mp so that the load is energized when the output of the timer is high remove the Shorting Block from JMP7 Connect the positive lead if applicable of the load to J5 pin 2 Connect the negative lead if a...

Page 22: ...any solder joint that causes you to have the slightest question should be re soldered Proper power connection Proper input circuit connection don t forget the ground connection For the Faults given be...

Page 23: ...S Remove JMP3 to install the differentiator If you are still unable to solve your kit problems you may send your kit in for repair For instructions on how to return kits for repair please see the Fact...

Page 24: ...1 0 H 63 5mm W X 63 5mm L X 25 4mm H Weight 1 1 Oz 0 0312 Kg CONCLUSION We sincerely hope that you will enjoy the use of this Ramsey product As always we have tried to compose our manual in the easies...

Page 25: ...ctory for a full refund less shipping The return package should be packed securely Insurance and tracking is highly recommended A reminder this applies to unassembled kits They must be in the same new...

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