KT88/EL34... Single Ended Tube Amplifier Build Robert Zovko 2018-11-13 | At the beginning of the year, I found this interesting scheme of tube amplifiers on a forum and decided to make it.After design of layout I ordered the necessary parts.In the meanwhile, looking for other experiences I found this great Youtube channel Blueglow Electronics:youtube.com/channel/UCVXv8_dfJjqWluEFktmv12AThe amplifier sounds great compared to the complexity and I recommend it for beginners just like myself.Scheme and photos:drive.google.com/drive/folders/1Rqmmk1zfr7pjKpcxIyYwgJMl04cFXmzO
Installation of TXG4 - RXG3 on bait boats Robert Zovko 2024-02-22 | Installation of TXG4 - RXG3 on bait boats with 380 and 390 engines and installation of Deeper sonar.The advantage of the TXG4 remote is that it is designed for one-handed operation and has 24 fishing positions.instruction manual:http://www.qingdaowuzhi.com/DownLoad/129111.html?a=download
External Antenna for Deeper Sonar Robert Zovko 2023-06-08 | How to install external antenna on the Deeper sonar@RobertZovko
Repaire and Upgrade Bait Boat FX88, D18B, V010, VERY100... Part 2 Robert Zovko 2022-02-26 | In this part, I showed how I maintain electric motors and how I use a magnet as a holder for the rig to keep it from getting tangled.See also the first part, I recommend all this to be done before use.Part 1:youtu.be/BYpVfvTh0Rk
Repaire Bait Boat FX88, D18B, V010, VERY100... Robert Zovko 2021-09-16 | After several months of use at sea and on the lake, the first problems arose due to poor sealing.In this video, I showed how I am an example of how to seal critical places and replace the GSNN module (GPS module) ...
Build of OTL tube (valve) amplifier Robert Zovko 2020-08-07 | This is my attempt to build an OTL tube amplifier according to the Japanese scheme. I used, NOS Soviet electronic tubes, the output tubes are 6N13S (6H13C) replacement is 6AS7, 6AS7GA, 6080 ..., the drivers are 6N6P replacement is 6CG7 ... and the preamp is 6J4P replacement is 6AU6.As the amplifier I use for the drive and headphone, voltage filtering must be exceedingly good, without a choke the filter capacitors must be significantly bigger. I had to perform the power supply of the preamp heater with DC power supply, otherwise it has too much noise (too compact design or is it a matter of electronic tubes?).Download link for schematics, LTspice model (OTL 6N13S.asc, tube.inc), photos:drive.google.com/drive/folders/1SN8fLlPXu_aaPHYIuotFU-5UOQsk7wXx?usp=sharing
Build 300B SE tube (valve) amplifier with toroidal transformers Robert Zovko 2019-11-12 | I read somewhere that a bad amplifier can't be made with a 300B tube (valve).This is my attempt with the standard scheme but with toroidal transformers (Toroidy) and with a slight modification of the scheme. I added the PS anti-noise part (see Aikido SE output stage).Schemes and photos:drive.google.com/drive/folders/14pkDOc4qTy3Q6pik64r8ylf0D3Icp-9A?usp=sharing
Fox FX11 reels maintenance and upgrade to 11 ball bearing Robert Zovko 2017-03-09 | Fox FX11 reels maintenance and replaced six bushings with ball bearings.
Postavljanje kupole makarske zvjezdarnice Robert Zovko 2014-11-16 | Sastavljanje i postavljanje kupole (proizvođač Ash-dome) makarske zvjezdarnice. Samo sastavljanje kupole je trajalo dva dana od 30.6. do 1.7.2009. dok su građevinski radovi trajali nekoliko tjedana.
Makarska - test Magic pie II Robert Zovko 2013-06-23 | ebike Makarska test riding - Magic pie II, web: http://robertzovko.wix.com/ebike
Speedict Mercury Robert Zovko 2013-06-15 | Speedict Mercury - Test1, web: http://robertzovko.wix.com/ebike
