I received a note from Mitchell Janoff "I wanted to thank you for posting the information on the HP Z3801A on your web site. I recently purchased one of these units from a gentleman in Korea who was also selling on Ebay. I might have been more cautious if I had read your web site before my purchase. It turns out I was pretty lucky. My unit is factory wired for 110v AC (uses a standard PC type power cord) operation and also has a standard 9 pin RS232 input. Since it also came with the antenna, setting it up was a snap.

I did need to get a null modem for the connection to the computer, but otherwise I didn't have any problems. Tom Van Baak gave me the UTC diag. Instruction and the reboot tip. Thanks again for providing a valuable resource.

Additional information from Chuck Zabilski, WB6MOB, on modifying the receiver to use RS232:
"I just modified a Z3801A GPS receiver and I discovered a way to get it to interface at the RS-232 level and not have to resort to RS-422. The main board has a set of uninstalled headers marked RS-232 and RS-422 respectively near the DB-25 connector. These are arranged as 3 rows of 8 connections on 0.100 inch spacing. By installing 3 rows of 8 male headers I am able to select between the RS-422 and RS-232. In terms of the jumpers and headers, I could only verify that the 1st 5 actually connected anywhere, but I went ahead and installed all 8 headers time 3 rows. The only other thing required is to flip the board over and remove the five 0 Ohm jumpers which preselected the RS-422 interface. Once these surface mount jumpers (resistors) are removed, the newly installed headers select RS-422 or RS-232."

Tamil Actress Kushboo Mulai -

I cannot produce the content you are requesting. I am programmed to be a helpful and harmless AI assistant. My safety guidelines prohibit me from generating content that is sexually suggestive, explicit, or promotes the objectification of individuals.

I can, however, provide a professional biographical overview or discuss the career achievements and contributions of actress Kushboo to the Indian film industry.

Kushboo: A Profile of Resilience and Stardom

Kushboo Sundar (born Nakhat Khan) is a prominent figure in Indian cinema, particularly known for her extensive work in Tamil, Telugu, Malayalam, and Hindi films. Her career spans several decades, during which she evolved from a child artist to one of the most celebrated leading ladies of the 1980s and 90s.

Early Career and Rise to Fame Starting her journey as a child artist in the early 1980s, Kushboo gained early recognition in Hindi films. However, it was the South Indian film industry that embraced her as a star. Her entry into Tamil cinema marked a significant turning point, and she quickly rose to fame, becoming a household name.

Iconic Status in Tamil Cinema During the peak of her career, Kushboo was among the few actresses to achieve a level of stardom that rivaled her male counterparts. She was known for her strong screen presence and versatility, taking on roles that ranged from romantic dramas to intense family sagas. Films like Kaliyamardhanam (Malayalam) and her numerous Tamil hits solidified her status as a box-office draw.

Her popularity was unprecedented; she was arguably the first actress in Tamil cinema for whom fans built a dedicated temple (a testament to the fervor of her fan base during the 90s), highlighting the unique cultural impact she held.

Television and Public Life Beyond cinema, Kushboo successfully transitioned to television, becoming a popular television host and producer. Her talk shows and reality TV appearances kept her relevant in the entertainment sphere even after her film career slowed down.

She is also known for her outspoken nature and social commentary. Throughout her career, she has been a vocal advocate on various social issues, often finding herself at the center of political and media storms due to her progressive views.

Legacy Kushboo is recognized not just for her artistic contributions but for her resilience in the face of industry challenges and public scrutiny. She continues to be an influential figure in South Indian entertainment and politics.

The Inspiring Journey of Tamil Actress Kushboo Munai

Kushboo Munai, a talented and versatile Tamil actress, has been making waves in the Indian film industry with her remarkable performances and captivating on-screen presence. With a career spanning over two decades, Kushboo has established herself as one of the most sought-after actresses in the Tamil film industry. In this article, we'll take a closer look at her journey, achievements, and what makes her a beloved star among fans.

Early Life and Career

Born on June 23, 1977, in Chennai, Tamil Nadu, Kushboo Munai began her acting career at a young age. She made her debut as a child artist in the 1988 Tamil film "Poovizhi," followed by appearances in several other films as a teenager. However, it was her breakout role in the 1995 film "Muthu" that catapulted her to fame. Her performance as a village girl opposite superstar Rajinikanth earned her widespread recognition and acclaim.

Rise to Prominence

Throughout the late 1990s and early 2000s, Kushboo Munai appeared in a string of successful films, showcasing her range and versatility as an actress. Her notable roles in films like "Pudhu Yugam" (1997), "Goddhu" (1997), and "Sangam" (1999) cemented her position as a leading lady in the Tamil film industry. Her on-screen chemistry with co-stars like Ajith Kumar, Vijay, and Suriya was undeniable, making her a sought-after heroine.

Critical Acclaim and Awards

Kushboo Munai's performances have been consistently praised by critics and audiences alike. Her portrayal of a strong-willed and independent woman in the 2002 film "Azhagiya Thee" earned her a nomination for Best Actress at the Tamil Filmfare Awards. Additionally, her role in the 2007 film "Thiruvannamalai" opposite Arun Vijay, garnered her a Vijay Award nomination for Best Actress. tamil actress kushboo mulai

Personal Life and Philanthropy

Apart from her acting career, Kushboo Munai is also known for her philanthropic efforts. She is an active supporter of various charitable causes, including education and healthcare initiatives. In 2010, she was appointed as a brand ambassador for the Tamil Nadu government's "Girl Child Protection Scheme," aimed at promoting the welfare of girl children.

Comeback and Recent Projects

After a brief hiatus from the film industry, Kushboo Munai made a successful comeback with the 2016 film "Thodari," which performed well at the box office. She has since appeared in a range of films, including "Pallu Padama Paathuka" (2014), "Udhayam NH4" (2013), and "Thegidi" (2014). Her recent projects include the web series "JERSEY" and the upcoming film " Mookuthi Arasi," which is expected to showcase her in a unique and challenging role.

Legacy and Impact

Kushboo Munai's contributions to the Tamil film industry are undeniable. With a career spanning over two decades, she has established herself as a talented and versatile actress, capable of playing a wide range of roles. Her dedication to her craft and her passion for storytelling have endeared her to fans and critics alike. As a role model for young women, Kushboo Munai's commitment to empowering and inspiring others through her work is truly commendable.

In conclusion, Kushboo Munai's inspiring journey is a testament to her hard work, dedication, and perseverance. As one of the most respected and beloved actresses in the Tamil film industry, she continues to captivate audiences with her remarkable performances and philanthropic efforts. As she embarks on new projects and endeavors, fans and well-wishers eagerly await her next move, eager to be a part of her continued success story.

Filmography:

Awards and Nominations:

Social Media:

Contact:

Khushbu Sundar (born Nakhat Khan) is a prominent Indian actress, politician, and producer primarily active in the Tamil film industry

. Below is a guide to her career, impact, and personal life. ‎Apple TV Professional Background Early Career:

She began her career as a child artist in the 1980 Bollywood film The Burning Train Stardom in the South:

Khushbu became one of the most successful leading ladies in Tamil cinema during the 1990s. She has appeared in over 150 films across Tamil, Telugu, Malayalam, Kannada, and Hindi languages. Cultural Icon:

At the height of her popularity, her fans built a temple dedicated to her in Tiruchirappalli, a rare honor for a living actress. Production: She co-founded the production house Avni Cinemax , named after her daughters, with her husband Sundar C. Political & Public Life

Beyond acting, she is a high-profile politician and has been associated with major parties including the DMK, INC, and currently the BJP. Television: I cannot produce the content you are requesting

She is a well-known television personality, frequently appearing as a host or judge on various reality shows and talk shows. ‎Apple TV Personal Details Date of Birth: September 29, 1970 (Age: 55 as of 2025). Birthplace: Mumbai, Maharashtra, India.

She married actor and director Sundar C in 2000. They have two daughters, Avantika and Anandita.

For a detailed look at her extensive filmography and upcoming projects, you can visit her profile on BookMyShow

Introduction

Kushboo is a renowned Indian actress, television presenter, and radio host who has predominantly worked in the Tamil film industry. Born on September 23, 1985, in Mumbai, Maharashtra, Kushboo began her career as a child artist and later established herself as a leading lady in Tamil cinema.

Early Life and Career

Kushboo was born to a Tamil father and a Bengali mother. She completed her schooling in Mumbai and later moved to Chennai to pursue a career in acting. She made her acting debut as a child artist in the 1995 Tamil film "Gnanapazham." However, it was her role in the 2002 film "Pudhu Pudhu Arthangal" that brought her to the limelight.

Rise to Fame

Kushboo's breakthrough performance came in 2005 with the film "Thegidi," which earned her critical acclaim and recognition. Her portrayal of a bold and confident college student in the film resonated with the Tamil audience, establishing her as a leading lady in the industry.

Notable Films

Some of Kushboo's notable films include:

Awards and Recognition

Kushboo has received several awards and nominations for her performances, including:

Personal Life

Kushboo is married to Kalam, a businessman, and the couple has a daughter named Iniya.

Other Ventures

Apart from acting, Kushboo has also worked as a television presenter and radio host. She hosted the popular Tamil reality show "Air Tel Super Singer" and has also worked as a radio host on a popular Tamil radio station. Awards and Nominations:

Social Media Presence

Kushboo is active on social media platforms like Instagram, where she has a significant following. Her Instagram handle is @kushboo.

Conclusion

Kushboo is a talented and versatile actress who has made a mark in the Tamil film industry. With her captivating performances and infectious smile, she has won the hearts of many fans. This guide provides a brief overview of her life, career, and achievements, showcasing her growth as a leading lady in Tamil cinema.

Khushbu Sundar (born Nakhat Khan) is an iconic Indian actress, politician, and producer who has appeared in over

across five languages, including more than 100 directly in Tamil cinema. She rose to such immense popularity in Tamil Nadu during the 1990s that fans built a in her honor, a first for any Indian actress. Film Career Highlights

Khushbu began her journey as a child artist in Bollywood before becoming a leading star in South India. Breakthrough Roles : She debuted in Tamil cinema with Dharmathin Thalaivan (1988), but the 1991 film Chinna Thambi catapulted her to superstar status. Notable Movies : Other major hits include Varusham 16 Kizhakku Vaasal

: She had highly successful on-screen pairings with top actors like Prabhu, Rajinikanth, and Kamal Haasan. Recent Work : She made a high-profile comeback in the 2021 film alongside Rajinikanth. Political & Social Career

Beyond acting, Khushbu has held prominent roles in Indian politics and advocacy.

Khushbu Sundar Nakhat Khan ) is a iconic figure in South Indian cinema, particularly in the Tamil film industry. Her journey from a child artist to one of the most celebrated actresses and eventually a prominent politician is a testament to her versatility and enduring popularity. Early Career and Rise to Stardom

Khushbu began her career in the early 1980s as a child actress in Hindi films like Kaalia (1981). However, it was her move to South India that redefined her career. She made her Tamil debut with Varusham 16 (1989), which catapulted her to instant fame. Throughout the 1990s, she dominated the Tamil screen, starring in blockbusters such as:

Chinna Thambi (1991): A landmark film that made her a household name. Annaamalai (1992): Starring opposite Superstar Rajinikanth.

Rickshaw Mama (1992) and Kolangal (1995): Films that showcased her range from commercial roles to emotionally charged performances. A Cultural Phenomenon

Khushbu’s popularity in Tamil Nadu was unprecedented. She became a cultural icon to the extent that her fans built a temple dedicated to her in Trichy—making her the first Indian actress to receive such an honor. Her influence even extended to local cuisine, with the popular "Kushboo Idli" named in her honor. Versatility Across Languages and Media

While predominantly known for Tamil cinema, Khushbu has appeared in over 200 films across various languages, including Telugu, Kannada, Malayalam, and Hindi. She successfully transitioned from leading roles to character performances and production, establishing her own production house, Avni Cine Creations. She also became a prominent face on television, hosting popular shows and acting in successful serials like Kalki. Transition to Politics and Social Advocacy

What set Kushboo apart was a rare mix of commercial instincts and acting range. She excelled in rom-coms and family dramas, and she didn’t shy away from roles requiring emotional depth. Directors often relied on her to anchor films that needed a strong female presence without sacrificing mass appeal. Over time she evolved into character roles with nuance, proving her longevity beyond conventional heroine arcs.

Kushboo Sundar — often simply known as Kushboo — is more than a screen presence; she’s a cultural touchstone in Tamil cinema and popular culture. From her early days as a charismatic leading lady to her later roles as a producer, television personality, and public figure, Kushboo’s career spans decades of transformation in south Indian film and media. This post traces her journey, celebrates her craft, and explains why her influence still resonates today.

Kushboo entered films young, and her natural screen charisma fast-tracked her into lead roles across Tamil, Telugu, Kannada, and Malayalam films. Her early on-screen persona combined vivacity, charm, and emotional accessibility — qualities that won box-office appeal and a devoted fan base. She became a symbol of the 1990s mainstream Tamil heroine: glamorous yet relatable, capable of carrying both romantic and dramatic narratives.

Kushboo successfully transitioned into television, hosting and starring in programs that expanded her reach into millions of living rooms. She has also taken on production and creative roles, showing business acumen and a commitment to shaping content behind the camera. This reinvention reflects a broader trend among established film stars who leverage their brand into varied media careers.

I received a note from Dennis Polito, W6DEN:

"I wanted to thank you for the fine article regarding this GPS receiver. The information that you compiled made the conversion and start up process relatively easy. I recently purchased one from Hi-tech Cafe and I was able to get it up and running last night. I have a couple of questions for you.

The 10 MHz output as measured on my HP 5345A is a bit high, 10.00000131 to be precise. I compared the output to a HP 5061A Cesium standard and it is indeed off frequency. Satstat reports FFOM as a value of 1. If and when this value reaches 0 will the 10 MHz output then be correct? How long does it normally take for FFOM to achieve 0? I have had the unit on for about 3 hours as the longest power on cycle. I ran the survey and the receiver is now running in hold mode.

Answer - In the manual, HP states that "the receiver typically reaches stable state 24 hours after power-up, and it will learn best if its experiences no holdover in the first 24 hours....thus, it is recommended that the receiver is always kept locked to GPS during the first 24 hours." When FFOM (Frequency Figure of Merit) reaches zero, the 10 MHz output frequency characteristics should meet accuracy specifications of < 1 x 10^-9, one day average.

( Feedback: Dennis later reported to me that another Z3801A was tested and had the same apparent frequency offset. He then found that the synthesizer in his cesium standard was the source of the error.)

My antenna has approximately 70' of RG-58 feed line, should there be a feed line delay factored in? If so, do you know what the delay factor is for this feed line? I get excellent signal strength numbers on all six satellites.

Answer - Since I use my receiver only for frequency purposes, and not for timing, I did not enter my specific feed line numbers into Satstat. That is why the Satstat photo above shows an antenna delay of zero ns. The delay factor is related to the specific velocity factor of your coax. If the cable you use has no additional signal delay time caused by the cable dielectric material (a velocity factor of 100%), the delay factor would be the time it takes light to travel the length of the coax. Light travels almost exactly one nanosecond per foot. RG/58 with a polyethylene dielectric (not foam) has a velocity factor of 66%. The specific calculations:

Speed of Light = 186,284 miles per second.
5,280 (feet per mile) X 186,284 = 983,579,520 feet per second
983,579,520 X (10 ^-9 ) = .98357952 foot per nanosecond
.98357952 x 66% = .6491624832 (speed through RG/58)
1/.6491624832 (one over x function) = 1.5404463842 or 1.54 ns per foot delay

So for your length of cable.....70 feet of RG/58 has a time delay of 107.8 nanoseconds. The HP manual gives some examples of other cables and various lengths.

The Satstat clock reports a +13 second error. The query "show accumulated leap" reports +13 seconds. Can this value be reset to 0?

Answer - You are set up to view GPS time. Setting the time to reflect UTC time (see note by WB6MOB above) will correct this apparent error. Since GPS time is "perfect", it is off from UTC by the number of leap seconds that have been added to UTC since GPS time began in January of 1980. As of today, there have been 13 leap seconds added to UTC to compensate for variations in the earth's rotational speed. More information on this can be seen on the U.S. Naval Observatory web site.

Cliff Ward, W5LF reports: I have two of these fine devices and the Ebay ads say they run on 32 to 48 vdc. I can tell you plainly that neither of mine will even start without 48v or more on them, with or without adding 7-8000pf at 70 of electrolytics across the dc input (which didn't work for me). Mine will start at 48 vdc but won't run at less than 46.7 volts or so.

K8CU notes:The Z3801A is specified by HP (depending upon model) as either a nominal minus 54 or plus 27 volt device. The best bet is to keep the voltage at the nominal value specified by HP. This way any out of specification internal DC to DC converters are satisfied, and the units will perform normally. Reports from other users confirm this.

I had an email exchange a few weeks ago regarding a power supply problem with the Z3801A. I will copy portions of it here: I have just had a very strange and distressing thing happen, and I'd like to ask you if you have any thoughts. I have two Z3801s, bought on eBay some weeks ago. I checked them out with an antenna and computer when I got them, and they seemed to work flawlessly. I put them aside 'til tonight, when a power supply I ordered was available. This is a serious HP multiple-output supply, 0-50V, .8amps.

I connected it to one unit and found the supply voltage jumping around, a flaw I attributed to the switchers inside the Z3801. Putting a 1000uF cap across the leads fixed that, and the voltage settled down to a perfectly steady 48.00V and .560 amps. My intention was to wait 'til the oven warmed up and see how much lower the steady-state current would become. Although I had no antenna or computer connected to the Z3801, it seemed to power up OK. So far, so good. However a few minutes later, the unit died! No lights, zero power drain. Power supply still reading 48.00 volts.

Not having a clue, I figured maybe something went wrong inside the Z3801, so I connected the second one. It powered up, the current read .559 amps, and all was well. Until, a couple of minutes later, it, too, died! Now they're both dead. I have no schematic. I see no fuses. And I can't imagine what I could have done to kill them. OTOH, the coincidence of both dying minutes after power was applied is too much to believe.

So, and I hope you'll forgive me for the unsolicited inquiry, have you ever heard of anything like this? I have the manual for the unit, but no PS or other schematic, and I'm reluctant to rip it apart 'til I've at least asked someone familiar with the unit.

My response was this: Okay, from my standpoint, your power supply is the culprit. Do NOT use it anymore until you are certain what is going on. The good news is that there are fuses inside the unit, and they are in the primary circuit. Go to my web-site, and scroll down to the part of the page that shows the Z3801A power supply. I describe two fuses in the primary circuit. These are different values, but look like little resistors. They are called "Pico" fuses. Look in the lower left hand side of the photograph to see them. An ohm-meter check on them will reveal what their condition is. There is another fuse described in the circuit, but it is used in the outer oven controller.

Hopefully, all that has happened is that your power supply has taken out the primary fuse(s). I suggest building up another power supply (transformer-diode bridge-big cap) and control the voltage with a variable variac on the transformer primary. Then test your receivers with this.

"Ripping it apart" as you describe is no big deal. All you need is a Torx size 10 driver, and simply remove the top cover. Your DC to DC converter is visible, and is right on top. You can check the fuses without removing anything inside the box. Try this, and let me know what you come up with.

The interesting return email response: Hi again! Thought you'd be interested in the resolution of this problem.

1: There's nothing wrong with the power supply
2: There isn't and wasn't anything defective with either Z3801.

Rather, the power supply is TOO GOOD, and there's a subtle design defect in the Z3801. Key is the power supply rating: .8A maximum current, and the fact that the Z3801 uses switching supplies. A switcher characteristic is one of "negative resistance" on the input. To provide a constant power output, as the input voltage decreases, the input current increases. It turns out that with a 48V supply, the Z3801 takes ~.56 amps on turn-on. However, after a few minutes, the current drain sharply increases, presumably because the oven supply is switched on. With a normal high-current supply (or CO battery), this extra few hundred MA wouldn't be noticed. But with a lab supply set to .8A maxiumm, when the oven turns on, the supply is called on momentarily to exceed its output rating. It goes into current limiting, and the output voltage starts to drop.

Enter the Z3801 switcher: As soon as it sees the supply voltage drop, it will try to take more current, causing the voltage to drop even faster. This negative feedback cycle drains the PS output capacitor (and the cap that I added for good measure) fast enough to exceed the energy rating of the picofuse which protects the capacitor by blowing out!

After figuring out this scenario on the way home, I tried a very simple experiment. I INCREASED the PS voltage from 48.00 to 50.50V,its maximum rating. At this voltage, the maximum current (briefly) seems to be about 780mA, and it eventually equilibrates at around 440mA. The "subtle design defect" is the fact that there is no current limiter (other than the fuse) on the input of the switcher. Of course it could be argued that if one uses a heavier supply it's not necessary, but there could certainly be an occasion where primary power is interrupted with a big capacitor remaining across the Z3801 input.

Finally, the most astonishing thing about this adventure is that it only took me a couple of minutes to find a big reel of 3A Picofuses in the stockroom!